OPERATING AND SERVICE MANUAL
DIGITAL
VOLTMETER
3455A
HEWLETT
PACKARD
-hp- 3455A
HEWLETT
PACKARD
OPERATING AND SERVICE MANUAL
MODEL 3455A
DIGITAL VOLTMETER
Serial Numbers: 1622A00I01 and Greater
IMPORTANT NOTICE
This loose leaf manual does not normally require a change sheet. All
major charrge information has been integrated into the manual by
page revision. In cases where only minor changes are required, 8
change sheet rnay be suttplied.
If the Serial Number of your instrument Is lower than the one on
this title page, the manual contains revisions that do not apply to
your Instrument. Backdatirtg information given in the manual adapts
it to earlier instruments,
Where practical, backdating Information Is Integrated into the text,
parts list and schematic diagrams. Backdating changes are denoted
by a delta sign. An open delta (A) or lettered delta (A^) on a given
page, refers to the corresponding backdating note on that page.
Backdating changes not integrated into the manual are denoted by
a numbered delta <At I which refers to the corresponding change in
the Backdatirtg section (Section VIO.
To help minimize the possibility of electrics! fire or shock
hazards, do not expose this instrument to rain or excessive
moisture.
Mtnual Part No. 03455-90003
Microfiche Part No. 03455-90053
(DCopyright Hewlett-Packard Company 1976
P.O. Box 301, Loveland, Colorado, 80537 U.S.A.
Printed: July 1979
Who\ HEWLETT
%LfiM PACKARD
CERTIFICATION
Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the
factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United Slates Ha-
lional Bureau of Standards, to the extent allowed by the Bureau 's calibration facility, and to the calibration facilities
of other International Standards Organization members.
WARRANTY
This Hewlett-Packard product is warranted against defects in material and workmanship for a period of one year
from date of shipment (.except that in the case of certain components listed in Section I of this manual, the warranty
shall be for the specified period] . During the warranty period, Hewlett-Packard Company will, at its option, either
repair or replace products which prove to be defective.
For warranty service or repair, this product must be returned to a service facility designated by -hp-. Buyer shall
prepay shipping charges to -hp- and -hp- shall pay shipping charges to return the product to Buyer. However, Buyer
shall pay all shipping charges, duties, and taxes for products returned to -hp- from another country.
Hewlett-Packard warrants that its software and firmware designated by -hp- for use with an instrument will execute its
programming instructions when properly installed on that instrument. Hewlett-Packard does not warrant that the
operation of the instrument, or software, or firmware will be uninterrupted or error free.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer,
Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental
specifications for the product, or improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HEWLETT-PACKARD SPECIFICALLY
DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES. HEWLETT-
PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT. SPECIAL. INCIDENTAL. OR CONSE-
QUENTIAL DAMAGES. WHETHER BASED ON CONTRACT. TORT. OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product maintenance agreements and other customer assistance agreements are available
for Hewlett-Packard products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office.
Addresses are provided at the back of this manual.
10 / 1 / 7 *
Model 3455A
Table of Contents
TABLE OF CONTENTS
Section Page
I. GENERAL INFORMATION 1-1
1-1. Introduction 1-1
1-5. Specifications 1-1
1-7. Instrument and Manual Identification . . . I-l
1-11. Description 1-1
1-13. Options 1-1
1-15. Accessories Supplied 1-1
1-17. Accessories Available 1-1
1-19. Recommended Test Equipment 1-1
Section Page
II. INSTALLATION 2-1
2-1. Introduction 2-1
2-3. Initial Inspection 2-1
2-5. Preparation for Use 2-1
2-6. Power Requirements 2-1
2-8. Line Voltage Selection 2-1
2-10. Power Cable 2-1
2-12. Grounding Requirements 2-1
2-14. Bench Use 2-1
2-16. Rack Mounting 2-2
2-18. Interface Connections 2-2
2-22. Environmental Requirements 2-2
2-23. Operating and Storage Temperature. . .2-2
2-26. Humidity 2-3
2-28. Altitude 2-3
2- 30. Repackaging for Shipment 2-3
Section Page
111 OPERATING INSTRUCTIONS 3-1
3- 1. Introduction 3-1
3-3. Operating Characteristics 3-1
3-4. Turn-On and Warm-Up 3-1
3-6. Self-Test Operation 3-1
3-10. DC Voltage Measurement 3-1
3-12. Resistance Measurement 3-2
3-14. AC Voltage Measurement 3-2
3-19. Math Feature 3-3
3-23. Enter and Store 3-4
3-27. High Resolution Mode 3-4
3-29. Auto-Cal 3-5
3-33. Trigger 3-5
3-36. Sample Rate 3-5
3-38. Auto Range 3-6
3-41. Guarding 3-6
3-42. Common-Mode Voltages 3-6
3-44. Guard Connection 3-6
3-46. Guarding Information 3-6
3-48. Remote Operation 3-7
3-49. General 3-7
3-53. Address Selection 3-7
3-56. Program Codes 3-8
3-61. Data Messages 3-9
3-69. Device Control Messages 3-12
3-78. Interrupt and Device Status
Messages 3-12
3-82. Data Output Characteristic 3-13
3-84. Bail Out Message 3-13
3-86. Instrument Measurement Times
(Remote Control) 3-13
3-88. Remote Programming Examples 3-14
3-90. Operators Checks 3-14
3-92. Bench Use 3-14
3- 94. HP-IB Operation 3-14
Section Page
IV. PERFORMANCE TESTS 4-1
4- 1. Introduction 4-1
4-3. Equipment Required 4-1
4-5. Performance Test Card 4-1
4-7. Calibration Cycle 4-1
4-9. Input Terminals/Control Settings 4-1
4-11. Performance Test Failure 4-1
4-13. Specification Breakdown 4-1
4-17. I>C Accuracy Test Considerations 4-2
4-26. Operational Verification Tests 4-3
4-27. DC Operational Accuracy Test 4-3
4-30. Test Procedure 4-3
4-31. AC Operational Accuracy Test 4-5
4-34. Test Procedure 4-5
4-35. Ohmmeter Accuracy Test 4-8
4-37. Test Procedure 4-8
4-38. DC Voltmeter Input Resistance Test. . . .4-9
4-39. Performance Test 4-9
4-40. DC Voltmeter Accuracy Test 4-9
4-43. Test Procedure 4-10
4-44. C Voltmeter Accuracy Test 4-12
4-47. Test Procedure 4-12
4-48. Ohmmeter Accuracy Test 4-16
4-50. Test Procedure 4-16
4-51. Common-Mode and Normal-Mode
Rejection Test 4-17
4-54. Test Procedure 4-17
4-55. DC Voltmeter Input Resistance
Test 4-18
4- 56. AC Voltmeter Input Impedance
Test 4-19/4-20
Section Page
V. ADJUSTMENTS 5-1
5- 1. Introduction 5-1
5-3. Equipment Required 5-1
5-5. Adjustment Interval 5-1
5-7. Adjustment Sequence .5-1
5-9. Test Point and Adjustment Locations. . .5-1
5-11. DC Zero Adjustments 5-1
5-12. DC and Ohms Reference Adjustments. . .5-2
5-14. Adjustment Procedure 5-2
5-15. RMS Convertor Adjustments
(Standard Model 3455A Only) 5-3
5-16. Average Convertor Adjustments
(345SA Option 001 Only) 5-4
5-18. Adjustment Procedure 5-4
iii
Table of Contents
Model 3455A
TABLE OF CONTENTS (Cont'd)
Section Page
VI. REPLACEABLE PARTS 6-1
6-1. Introduction 6-1
6-4. Ordering Information 6-1
6-6. Non-Listed Parts 6-1
6-8. Parts Changes 6-1
6-10. Proprietary Parts 6-1
6-12. Exchange Assemblies 6-2
6- 15. Service Kit 6-2
Section Page
VII. MANUAL CHANGES 7-1
7- 1. Introduction 7-1
Section Page
VIII. SERVICE 8-1
8- 1 Introduction 8-1
8-3. Safety Considerations
8-8. Recommended Test Equipment 8-1
8-10. Introduction 8-2
8-12. Input Switching and DC Attenuator. . .8-2
8-13. General 8-2
8-15. Detailed Description 8-2
8-17. Operational Attenuator 8-2
8-19. Auto Calibration-DC Voltage 8-2
8-20. General 8-2
8-22. Circuit Description 8-4
8-34. Auto-Calibration-Ohms 8-9
8-35. General 8-9
8-37. Circuit Description 8-9
8-42. Auto Calibration-A/D Convertor. . . .8-10
8-44. Circuit Description 8-11
8-47. True RMS AC Convertor 8-11
8-48. General 8-11
8-50. Circuit Description 8-11
8-56. Average Responding AC Convertor
(Option 001) 8-12
8-57. General 8-12
8-59. Circuit Description 8-12
8-65. Ohms Convertor 8-13
8-66. General 8-13
8-68. General Description 8-13
8-73. DC Preamplifier 8-14
8-74. General 8-14
8-76. Circuit Description 8-14
8-82. Reference Assembly 8-16
8-83. General 8-16
8-85. Circuit Description 8-16
8-87. Analog-to-Digital Convertor (A/D).. 8-16
8-88. General 8-16
8-92. Circuit Description 8-17
8-103. Inguard Controller 8-19
8-104. General 8-19
8-107. Circuit Description 8-19
8-M5. Main Controller 8-22
8-116. General 8-22
8-118. Circuit Description 8-23
8-141. HP-IB Circuit 8-29
8-142. General 8-29
8-144. Circuit Description 8-29
8-168. Front Panel Operation 8-32
8-169. Circuit Description 8-32
TROUBLESHOOTING
8-174. Introduction 8-35
8-176. General Block Diagram Theory
of Operation 8-35
8-179. Outguard Section 8-35
8-185. Inguard Section 8-36
8-194. Preliminary Troubleshooting Check.. 8-36
8-195. Instrument Half-Splitting
Techniques 8-36
8-198. Service Group Summary 8-37
SERVICE GROUP A
8-A-l Turn-On Circuitry (Inguard and
Outguard) 8-40
8-A-3. Inguard/Outguard Isolation 8-40
8-A-5. Outguard Troubleshooting
(Schematic 8) 8-40
8-A-6. Inguard Troubleshooting
(Schematic 5, 6, 7) 8-40
8-A-8. AlO Motherboard Troubleshooting
(Schematic 5, 6, 7) 8-40
8-A-lO. A/D Board Troubleshooting
(Schematic 5, 6) 8-41
8-A-12. Inguard/Outguard Transfer Circuit
Troubleshooting (Schematic 7,8) 8-41
SERVICE GROUP 6
8-B-l. Auto-Cal and DC Troubleshooting
(Inguard) 8-43
8-B-3. Auto-Cal Constants 8-43
8-B-9. Auto-Cal Switch Closures
(Schematic 1, 5, 6, 7) 8-50
8-B-l I . Cal Constants Service Procedure 8-50
8-B-14. Switch Closure Table 8-52
8-B-16. Auto-Cal Troubleshooting
(Schematic I, 7) 8-52
8-B-18. DC Inoperative (Schematic 1) 8-54
8-B-20. Leakage and Other Various
Malfunctions 8-54
8-B-23. 10 V Range or Constant 10 and 11 Fail. . .8-55
8-B-24. 1 V Range or Constant 0, I , and 2 Fails . . 8-55
8-B-25. 100 mV Range or Constant 3 Fails 8-55
8-B-26. 100 V Range or Constants 5, 4, and 7
Fail 8-55
8-B-27. 10(X) V Range or Constant 6 Fails 8-56
8-B-28. Various Other Malfunctions 8-56
8-B-30. Other Troubleshooting Hints 8-57
8-B-3I. General Noise 8-57
8-B-33. IX: Noise (Schematic 1, 5. and 6) 8-57
iv
Model 3455A
Table of Contents
TABLE OF CONTENTS (Cont'd)
SERVICE GROUP C
8-C-l. AC Convertor Troubleshooting 8-59
8-C-2. True RMS Convertor Servicing
(Schematic 3) 8-59
8-C-4. Preamplifier and Input Alternator
Circuitry 8-60
8-C-6. Absolute Amplifier Circuitry 8-61
8-C-8. Squaring Amplifier, Intergrator, and
Antilog Circuitry 8-61
8-C-IO. AC/DC Operation 8-62
8-C-12. AC Noise (Schematic 3) 8-62
8-C-16. Miscellaneous Troubleshooting
(Schematic 3) 8-63
8-C-17. Average Responding AC Convertor
(Schematic 2) 8-64
SERVICE GROUP D
8-D-l. Ohm Troubleshooting (Schematic 1,4).. .8-65
8-D-2. Ohms Circuit Isolation 8-65
8-D-4. Ohms Servicing 8-65
8-D-6. Ohms Convertor Troubleshooting
(Schematic 1, 4) 8-65
8-D-8. Miscellaneous Ohms Troubleshooting
Hints 8-66
8-D-9. Ohms Offsets 8-66
8-D-ll. Ohms Noise (Schematic 1,4) 8-67
SERVICE GROUP E
8-E-l. A/D Convertor and Inguard Logic
Troubleshooting 8-68
8-E-2. A/D Convertor Servicing
(Schematic 6, 7) 8-68
8-E-4. No A/D Waveform 8-69
8-E-6. Incorrect A/D Waveform 8-69
8-E-7. Correct A/D Waveform 8-69
8-E-8. A/D Noise (Schematic 6) 8-70
8-E-lO. Inguard Logic Troubleshooting
(Schematic 7) 8-70
8-E-12. Inguard Logic Troubleshooting with
no A/D Waveform 8-70
8-E-I3. Inguard Logic Troubleshooting with
an A/D Waveform 8-72
SERVICE GROUP F
8-F-l. Outguard Logic Troubleshooting
(Schematic 8, 9, 10) 8-73
8-F-3. Main Controller Troubleshooting
(Schematic 8) 8-73
8-F-4. Front Panel Troubleshooting 8-73
8-F-5. Front Panel Operation Check 8-73
8-F-6. Front Panel Servicing (Schematic 10). . . .8-74
8-F-7. Front Panel LED’s Switch, and Key
Cap Replacement Procedure 8-74
8-F-8. HP-IB Troubleshooting (Schematic 9). . .8-75
SERVICE GROUP 6
8-G-l. Miscellaneous Troubleshooting 8-76
8-G-2. Power Supplies (Schematic 11) 8-76
8-G-3. Reference Assembly (Schematic 5) 8-76
8-G-4. Turn-Over Errors (Schematic 1, 5,
and 6) 8-77
8-G-6. Other Troubleshooting (Schematic 8
and 11) 8-77
SERVICE GROUP H
8-H-l . T roubleshooting Diagrams 8-78
8-H-3. General Troubleshooting Diagram 8-78
8-H-4. Inguard Troubleshooting Diagram. 8-8 1/8-82
8-H-6. Outguard Troubleshooting 8-117/8-118
APPENDIX
Page
A-1. Introduction A-1
A-4. Program Example #1 A-1
A-5. Program Example #2 A-2
LIST OF TABLES
Table Page
1-1. Specifications 1-2
1-2. Typical Operating Charaaeristics 1-4
1-3. Recommended Test Equipment 1-6
3-1. Maximum Front Panel Reading Rates 3-6
3-2. HP-IB Interface Capability 3-7
3-3. Bus Messages 3-8
3-4. HP-IB Program Codes 3-9
3-5. Binary Program Codes 3-11
3- 6. Typical HP-IB Controlled Meassurement
Times 3-14
4- 1. DC Accuracy Test (1 V, 10 V Full Scale;
High Resolution On) 4-3
Table Page
4-2. DC Accuracy Test (High Resolution Off). . .4-5
4-3. DC Accuracy Test (High Resolution On). . .4-5
4-4. AC Accuracy Test 30 Hz to 100 kHz
(Standard Model 3455 A only) 4-7
4-5. AC Accuracy Tests 100 kHz to 1 MHz
(Standard Model 3455 A only) 4-7
4-6. AC Accuracy Test 30 Hz to 100 kHz
(3455 A Option 001 only) 4-8
4-7. Two-Wire Ohm Accuracy Test 4-8
4-8. Four-Wire Ohms Accuracy Test 4-9
4-9. DC Accuracy Test (1 V, 10 V Full-Scale;
High Resolution OfO 4-10
V
Table of Conienis
Model 3455A
LIST OF TABLES (Cont'd)
Table Page
4-10. DC Accuracy Test (1 V, 10 V Full Scale;
High Resolution On) 4-10
4-11. DC Accuracy Test (High Resolution OfO. - ^11
4-12. DC Accuracy Test (High Resolution On). .4-11
4-13. AC Accuracy Test 30 Hz to 100 kHz
(Standard Model 34SSA only) 4-14
4-14. AC Accuracy Test 100 kHz to 1 MHz
(Standard Model 34SSA only) 4-IS
4-15. AC Accuracy Test 30 Hz to 100 kHz
(Model 345SA Option 001 only) .4-15
4-16. Two-Wire Ohm Accuracy Test 4-16
4- 17. Four-Wire Ohms Accuracy Test 4-17
5- 1. DC Zero Adjustment Padding List
(AlORllO) 5-2
5-2. Jumper Removal (A15 Board) 5-4
5-3 . Jumper Removal (A 1 3 Board) 5-4
6-1. Standard Abbreviations 6-1
6-2. Code List of Manufacturers 6-2
6-3. Replaceable Parts 6-3
8-1. AC Convertor Ranging 8-11
8-2. A/D Convertor Switch Control Signal
Descriptions 8-21
8-3. Service Group Listing 8-38
8-B-l. Auto-Cal Constants 8-43
8-B-2. Auto-Cal Switch Closures 8-50
8-B-3. Gate Function in Auto-Cal 8-51
8-B-4. Switch Driver Voltage Levels 8-51
8-B-5. Cal Constant Monitoring Points.
8-B-6. 3455 A DVM Switch Closures 8-53
8-B-7. Possible Auto-Cal Failure Causes 8-54
8-D-l. Ohms Gain and Switch Configuration. . . .8-66
8-E-l. Mneumonic Definitions 8-71
8-G-l. Power Supplies Locations 8-76
LIST OF ILLUSTRATIONS
Figure Page
2-1. Line Voltage Selection 2-1
2-2. Power Cord Configuration 2-1
2- 3. Typical HP-IB System Interconnections. . , .2-2
3- 1. Front and Rear Panel Features 3-0
3-2. Ohmmeter Measurement Connections 3-2
3-3. Connecting the Guard 3-7
3-4. Address Selection 3-8
3- 5. Operational Verification Flowchart. .3-15/3-16
4- 1. Ambiguous Regions 4-3
4-2. DC Accuracy Test 4-4
4-3. AC/E>C Thermal Transfer Measurement
(Alternate Frequency Response Test). . . .4-6
4-4. DC Accuracy Test 4-11
4-5. AC/DC Thermal Transfer Measurement
(Alternate Frequency Response Test). . .4-13
4-6. DC Common-Mc^e Rejection Test 4-18
4- 7. AC Common-Mode Rejection Test 4-18
5- 1. 100 Volt Zero Adjustment 5-1
5-2. 1 Volt Zero Adjustment 5-2
8-1. Function Block Diagram 8-1
8-2. Simplified Input Switching Diagram 8-2
8-3. Operational Attenuator Diagram 8-3
8-4. Basic Voltmeter Diagram 8-3
8-5. Simplified Auto-Cal Switching Schematic. .8-3
8-6. 10 V dc Input Offset Error measurement. . .8-4
8-7. 1 V dc Input Offset Error Measurement. . . .8-4
8-8. .1 V dc Input Offset Error Measurement. . .8-5
8-9. 100 V dc and 100 V dc Input Offset
Error Measurement 8-6
8-10. 10 V dc Gain Error Measurement 8-6
8-11. .1 V dc and 1 V dc Gain Error
Measurement 8-7
8-12. 1 V dc Reference Offset Error
Measurement 8-7
8-13. 100 V dc and 1000 V dc Gain Error
Measurement 8-8
8-14. 100 V dc Reference Offset Error
Measurement 8-8
8-15. Basic Ohms Measurement Diagram 8-9
8-16. 10 kO. 100 kft, 10 MO Offset Error
Measurement 8-9
8-17. Ohms Reference Measurement 8-10 8-10
8-18. Simplified A/D Convertor Diagram 8-10
8-19. Simplified True RMS Convertor 8-11
8-20. Simplified Average Responding AC
Convertor 8-12
8-21. Ohms Convertor Current Source 8-13
8-22. Ohms Convertor Voltage Limit 8-14
8-23. Equivalent DC Preamplifier Output
Circuit 8-15
8-24. DC Preamp, Simplifier Feedback
Circuitry 8-15
8-25. Simplified Voltage Reference Diagram. . . .8-16
8-26. Integrator Output Waveform 8-16
8-27. Integrator Output Waveforms for
Different Input Voltage Levels 8-17
8-28. Simplified A/D Input and Reference
Diagram 8-17
8-29. Simplified A/D Convertor Diagram 8-18
8-30. Simplified Inguard Controller
Flowchart 8-19
8-31. Controller Data Transfer Circuit 8-19
8-32. Data Transfer Signals 8-20
8-33. Inguard Controller Reset Circuit 8-20
8-34. Simplified A/D Convertor Control Circuit8-21
8-35. Simplified Program ROM Circuit 8-22
8-36. Simplified Output Circuit 8-23
8-37. Simplified Main Controller Flowchart. . . .8-24
8-38. Main Controller ROM Circuit 8-25
8-39. Main Controller RAM Circuit 8-26
8-40. Main Controller ALU Circuit 8-27
8-41. Main Controller Interrupt Circuit 8-28
8-42. Simplified Turn-On Interrupt Circuit 8-29
vi
LIST OF ILLUSTRATIONS (Cont'd)
8-43. Interface Connections and Bus Structure. .8-30
8-44. Simplified Block Diagram 8-3S
8-45. Inguard-Outguard Connections 8-37
8-B-l. Auto-Cal Constant #11 (10 V Offset) 8-44
8-B-2. Auto-Cal Constant #10 (10 V Gain) 8-44
8-B-3. Auto-Cal Constant #9 (10 K. 100 K.
and 10 M Offsets) 8-45
8-B-4. Auto-Cal Constant #8 (10 K, 100 K.
and 10 M Offsets) 8-45
8-B-5. Auto-Cal Constant #7(100 V Offset #2). . .8-46
8-B-6. Auto-Cal Constant #6 (1000 V Offset) 8-46
8-B-7. Auto-Cal Constant #5 (100 V Gain) 8-47
8-B-8. Auto-Cal Constant #4 (100 V Offset #1). . .8-47
8-B-9. Auto-Cal Constant #3 (.1 V Offset) 8-48
8-B-lO. Auto-Cal Constant #2 (1 V Offset I) 8-48
8-B-ll. Auto-Cal Constant#! (IV Offset <2)....8-49
8-B-I2. Auto-Cal Constant #0(1 V Gain) 8-49
8-E-1. A/D Waveforms 8-68
8-H-l. Assemble and Test Point Loading 8-79
8-H-2. General Troubleshooting Procedure
Diagram 8-79
8-H-3. Inguard Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 13 8-83/8-84
8-H-4. Inguard Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 12 8-85/8-86
8-H-5. Inguard Troubleshooting Procedure
Diagram Auto-Cal Circuitry
TEST II 8-87/8-88
8-H-6. Inguart Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 10 8-89/8-90
8-H-7. Inguart Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 9 8-91/8-92
8-H-8. Inguart Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 8 8-93/8-94
8-H-9. Inguart Troubleshooting Procedure
Diagram. Auto-Cal Circuitry
TEST 7 8-95/8-96
8-H-lO. Inguard Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 6 8-97/8-98
8-H-l 1. Inguard Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 5 8-99/8-100
8-H-12. Inguard Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 4 8-101/8-102
8-H-13. Inguard Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 3.
8-H-14. Inguard Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 2 8-I05/8-I06
8-H-15. Inguard Troubleshooting Procedure
Diagram. Auto-Cal Circuitry
TEST 1 8-107/8-108
8-H-I6. Inguard Troubleshooting Procedure
Diagram, Auto-Cal Circuitry
TEST 0 8-109/8-110
8-H-17. Inguard Troubleshooting Procedure
Diagram, Inguard/Outguard Transfer
Circuitry 8-111/8-112
8-H-18. Inguard Troubleshooting Procedure
Diagram, Power Supply and
Controller Circuitry 8-113/8-114
8-H-19. Inguard Troubleshooting Procedure
Diagram. A-to-D Convertor
Circuitry 8-115/8-116
8-H-20. Preliminary Outguard Troubleshooting
Procedure Diagram 8-119/8-120
8-H-21. Outguard Troubleshooting Procedure
Diagram, Main Controller
Circuitry 8-121/8-122
8-H-22. Outguard Troubleshooting Procedure
Diagram, RAM Circuitry 8-123/8-124
8-H-23. Outguard Troubleshooting Procedure
Diagram, ALU Circuitry 8-125/8-126
8-H-24. Outguard Troubleshooting Procedure
Diagram, Device Select
Circuitry 8-127/8-128
8-H-25. Outguard Troubleshooting Procedure
Diagram, Interrupt Circuitry. . .8-129/8-130
8-H-26. Outguard Troubleshooting Procedure
Diagram, Display Circuitry 8-131/8-132
8-H-27. Outguard Troubleshooting Procedure
Diagram, HP-IB Circuitry 8-133/8-134
8-H-28. Detailed Block Diagram 8-135
8-H-29. Input and Auto-Cal Switching
Schematic 8-147/8-148
8-H-30. Average Responding AC Convertor
8-149/8-150
8-H-31. True RMS AC Convertor
Schematic 8-151/8-152
8-H-32. Ohms Convertor Schematic 8-153/8-154
8-H-33. Reference Assembly 8-157/8-158
8-H-34. Analog-to-Digital Convertor
Schematic 8-159/8-160
8-H-35. Inguard Controller Schematic 8-161
8-H-36. Main Controller Schematic 8-167/8-168
8-H-37. HP-IB Schematic 8-169/8-170
8-H-38. Front Panel Assembly 8-171/8-172
8-H-39. Power Supply Schematic 8-173/8-174
vii
8-103/8-104
TJS% HEWLETT
PACKARD
SAFETY SUMMARY
TIm failnviRQ Rtittral Mfaty pracMtiMt mutt ba abaarvad during all phaaaa af aparatian, aarvica. and rapair af thia
initrumant Failara ta camply with thasa praeaatiaaa ar with tpacrfic warnings alsawhara in this manual violatas
safaty standards af dasign, manafsetara, and intandad usa of tha instruawnt Hawlatt Packard Company assumas no
liability for tha customar's failara ta comply with thasa raqairamants. This is a Safaty Clau 1 instramant
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cabinet must be connected to an elec-
trical ground. The instrument is equipped with a three-conductor ac power cable. The power
cable must either be plugged into an approved three-contact electrical outlet or used with a
three-contact to two-contact adapter with the grounding wire (green) firmiy connected to an
electrical ground (safety ground) at the power outlet. The power jack and mating plug of the
power cable meet International Electrotechnical Commission (lEC) safety standards.
00 NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes. Operation of any
electrical instrument in such an environment constitutes a definite safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified maintenance personnel. Do not replace components
with power cable connected. Under certain conditions, dangerous voltages may exist even with
the power cable removed. To avoid injuries, always disconnect power and discharge circuits
before touching them.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person, capable of rendering first
aid and resuscitation, is present.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Because of the danger of introducing additional hazards, do not install substitute parts or per-
form any unauthorized modification to the instrument. Return the instrument to a Hewlett-
Packard Sales and Service Office for service and repair to ensure that safety features are main-
tained.
DANGEROUS PROCEDURE WARNINGS
Warnings, such as the example below, precede potentially dangerous procedures throughout
this manual. Instructions contained in the warnings must be followed.
Dangerous voltages, capable of causing death, ore present in this instrument Use ai-
trome caution whoa handling, testing, end adjusting.
A
SAFETY SYMBOLS
General Definitions of Safety Symbols Used On Equipment or In Manuals.
i OR
77*7 X
Instruction manual symbol: the product will be marked with this
symbol when it is necessary for the user to refer to the instruction
manual in order to protect against damage to the instrument.
Indicates dangerous voltage (terminals fed from the interior by
voltage exceeding 1000 volts must be so marked).
Protective conductor terminal. For protection against electrical
shock in case of a fault. Used with field wiring terminals to in-
dicate the terminal which must be connected to ground before
opierating equipment.
Low-noise or noiseless, clean ground (earth) terminal. Used for a
signal common, as well as providing protection against electrical
shock in case of a fault. A terminal marked with this symbol must
be connected to ground in the manner described in the installation
(opierating) manual, and before operating the equipment.
Frame or chassis terminal. A connection to the frame (chassis) of
the equipment which normally includes all exposed metal struc-
tures.
Alternating current (power line).
Direct current (power line).
Alternating or direct current (power line).
WARNING 1
t
1
t
^caution}
The WARNING sign denotes a hazard. It calls attention to a pro-
cedure, practice, condition or the like, which, if not correctly per-
formed or adhered to. could result in injury or death to personnel.
The CAUTION sign denotes a hazard. It calls attention to an
operating procedure, practice, condition or the like, which, if not
correctly performed or adhered to. could result in damage to or
destruction of part or all of the product.
NOTE:
The NOTE sign denotes important information. It calls attention
to procedure, practice, condition or the like, which is essential to
highlight.
Model 3455A
Section I
SECTION I
GENERAL INFORMATION
1-1. INTRODUCTION.
1-2. This Operating and Service Manual contains informa-
tion necessary to install, operate, test, adjust, and service
the Hewlett-Packard Model 34SSA Digital Vdtmeter.
1-3. Included with this manual is an Operating information
supplement. The supplement is a duplication of the first
three sections of this manual and should be kept with the
instrument for use by the operator.
1-4. This section of the manual contains the performance
specifications and general operating characteristics of the
34SSA. Also listed are available options and accessories,
and instrument and manual identification information.
1-5. SPECIFICATIONS.
1-6. Operating specifications for the 34SSA are listed in
Table 1-1. These specifications are the performance stan-
dards or limits against which the instrument is tested. Table
1-2 lists general operating characteristics of the instrument.
These characteristics are not specifications but are typical
operating characteristics included as additional information
for the user.
1-7. INSTRUMENT AND MANUAL IDENTIFICATION.
1-8. Instrument identification by serial number is located
on the rear panel. Hewlett-Packard uses a two-section serial
number consisting of a four-digit prefix and a five-digit
suffix separated by a letter designating the country in
which the instrument was manufactured. (A = U.S.A.;
G * West Germany; J = Japan; U = United Kingdom.) The
prefix is the same for all identical instruments and changes
only when a major instrument change is made. The suHlx,
however, is assigned sequentially and is unique to each
instrument.
age measurements vrith five digit resolution and dc voltage
and resistance measurements with S or 6 digit resolution as
programmed by the user. The 3455 A employs an automatic
calibration (AUTO CAL) feature which automatically cor-
rects for possible gain and offset errors in the analog cir-
cuitry to provide maximum accuracy. A removable refer-
ence module permits external calibration of the dc voltage
and resistance functions. The reference module can be
removed, calibrated and returned to the instrument, or the
module can be replaced with another recently calibrated
reference. A MATH feature permits voltage or resistance
measurements to be scaled into convenient units or to be-
read directly in percent error from a selected reference.
The 34S5A is HP-IB programmable for system applications.
NOTE
HP-IB is Hewlett-Packard's implementation of
IEEE std 488-1975. “standard digital interface
for programmable instrumentation ”.
M3. OPTIONS.
1-14. The following options are available for use with the
Model 34S5A;
Option 001 : Average Responding AC Converter
Option 907; Front Handle Kit
Option 908: Rack Mounting Kit
Option 909: Front Handle and Rack Mounting Kit
Option 910: Additional Set of Operating Information
and Operating and Service Manuals
1-15. Accessories Supplied.
1-16. A service kit (-hp- Part No. 03455-8441 1) consisting
of a PC extender board and a fuse is supplied with the
Model 3455A.
1-17. ACCESSORIES AVAILABLE.
1-9. This manual applies to instruments with serial num-
bers indicated on the title page, if changes have been made
in the instrument since this manual was printed, a yellow
“Manual Changes" supplement supplied with the manual
vrill define these changes and explain how to adapt the
manual to the newer instruments. In addition, backdating
information contained in Section VII adapts the manual to
instruments with serial numbers lower than those listed on
the title page.
1-10. Part numbers for the manual and the microfiche
copy of the manual are also listed on the title page.
1-11. DESCRIPTION.
1-12. The Model 345SA Ehgital Voltmeter makes ac volt-
1-18. The following is a list of accessories available for use
with the Model 3455A.
Accessory No.
Description
11177A
341IIA
10631A
10631B
10631C
03455-61609
34S5A Reference Module
High Voltage Probe (40 kV dc)
HP-IB Cable 1 meter (39.37 in.)
HP-IB Cable 2 meter (78.74 in.)
HP-IB Cable 4 meter (157.48 in.)
Inguard/Outguard Service Cable
1-19. Recommended Test Equipment.
1-20. Equipment required to maintain the Model 3455A is
listed in Table 1-3. Other equipment may be substituted if
it meets the requirements listed in the table.
1-1
Section I
Model 3455A
Table 1-1. Specifications.
DC Voltage
Specificaiions apply with Auio-Cal ON
Maalaeaai
Raagaa: Diaplay:
High High High High
Resolution Resolution Resolution Resolution
Off On Off On
IV
± 149999V
IV
IV
•149999V
±1499999V
lOV
lOV
± 14.9999V
•14 99999V
1(K)V
lOOV
±149 999V
± 149.9999V
KXWV
1(XX)V
±1000.C)0V
•lOOO.OOOV
Raaga Selactioa: Manual. Automatic, or Remote
Performance (High Resolution Off)
Taaeparatar* Coafficlaat: (0*C to 50*0
O.IV range ±(0.0003% of reading *■ 0.15
diglisirC
IV range: ±(0.0003% of reading + 0.015
dlgUs)/“C
lOV range: ±(0.00015% of reading -i- 0.01
digits)/*C
100 & lOOOV rartge: ±(0.0003% of reading .01
digUs)/''C
Accaracy: (1 digit » .0019* of range) :
24 hours; 23°C ±rC
lOV rartge: ±(0.002% of reading *■ 1 digil)
IV range: ±(0.003% of reading + 1 digt)
O.IV range: ±(0.004% of readirtg + 4 digits)
100 & lOOOV range: ±(0.004% of reacfing + 1 di^}
90 days; 23°C ±5-C
lOV range. ±(0.005% of reading + 1 dlgitl
IV range; ±(0.006% of readirtg + 1 digil)
O.IV range: ±(0.007% of reading ■* 4 di^tsl
100 & lOOOV range: ±(0.007% of reading * 1 digil)
6 months; 23°C ±5’C
lOV range: ±(0.008% of reading + 1 di^t)
IV range: ±(0.009% of reading + 1 di^t)
O.IV range: ±(0.010% of reading + 5 digits)
100 & lOOOV range: ±(0 010% of reading + 1 digit)
1 year; 23“C ±5'C
lOV range ±(0.013% of reading * 1 digit}
IV range. ±(0.014% of reading -f 1 digit)
0 IV range: ±(0.015% of reading + 6 digits)
100 & lOOOV range ±(0.015% of reading + 1 digit)
Performance (High Resolution On)
T«Mp«ratNr* (0°C to 50°C)
IV range. ±(0.0003% of reading * 0.15
digitsl/’C
lOV range: ±(0.00015% of reading 0.1
digtls)/X
100.& lOOOV range: ±(0.0003% of reading 0.1
digiis)/X
Accaracy: (I digil « ,0
24 hours; 23X ± IX
lOV range:
100 & lOOOV range;
IV range
90 days; 23X ±5X
lOV rartge;
.0019* of range)
: (0.002% of reading ■* 3 digits)
r (0.004% of reading -f 3 digits)
: (0.003% of reading ■* 4 digits)
luv rartge; ±{0.005% of readirtg * 3 digits)
100 & lOOOV range: ±{0.007% of reading -t- 3 digits)
IV range: ±(0.006% of reading ■* 4 digits)
6 months; 2yc ±5X
lOV range: ±(0.008% of reading -t- 3 di^ts)
100 & lOOOV range ±(0.010% of reading •* 3 digits)
IV range; ±(0.009% of reading -t- 5 digits)
1 year 23X ±5X
lOV range ±(0.013% of reading -f 3 digits)
100 & lOOOV range: ±(0.015% of reading -f 3 di^te)
IV range. ±(0.014% of readirtg 4- 6 digits)
Input Characteristics
■•pat Reaiatsacc:
O.IV through lOV range: >10'" ohms
lOOV and lOOOV range: 10 megohm ±0.1%
(with AuiO-Cal OFF)
M«siM«ai lapat Voftagc:
High to Low Input Terminals: ±1000V pea)<
Guard to Chassis: ± 500V peak
Guard to Low Terminal: ±200V peak
NorM«l Mode Rcjectloa (NMR): NMR is the ratio of the
peak normal-mode voltage to the peak error voltage in
the reading.
50 Hz operation: > 60 dB at SO Hz ± 0.1 9o
60 Hz operation: > 60 dB at 60 Hz ± 0.1%
CoMMoa Mode Rajcctloa (ECMR): ECMR
is the ratio of the peak common-mode voltage to the
resultant peak error voltage in the reading with I k(l un-
balance in low lead.
AC Input:
$0 Hz operation: > 160dB at 50 Hz ± 0.1%
60 Hz operation: > 160 dB at 60 Hz ± 0.1%
DC Input:
> 140 dB
MaslaaM Reediag Rale:
f Hi Cata Laagtli
HSgb Hlfb
RaaelatSea ■••ofatloa
Off Ob
Local 5 readlngs/iec 3 readings/ sec
■aaoic 24 readJngs/sec 6 readlngs/sec
S«Hi Oaf Laapth
Hl|h
Raaofatloa
High
■••olatlea
Local
Besote
3.5 readings/ sec
2.5 readings/sec.
22 readings/sec
5 readings/sec.
1-2
Model 3455A
Table 1-1. Specifications (Cont'd).
Ohms
Section I
Masli
Raa|ce:
DUpiay:
High
High
High
High
Resolution
Resolution
Resolution
Resolution
Off
On
Off
On
Ikn
t49999kil
Ikn
Ikfl
1.49999kfl
1499999kfl
10 kn
lOkn
14.9999kn
14.9999%n
lOOkfl
lOOkn
I49 999kO
149.9999kn
lOOOkfl
lOOOkn
1499.99kn
1499.999kn
looookn
lOOOOkn
14999 9kn
14999 99kn
Raag* S«l*ctlo«: Manual. Aulomatk;. or Remote
FaBctio* S«l«ctloa: 2 wire k ohms or 4 wire k ohms
Performance {High Resolution Off)
Teaperalani Co«fficl«at: (OX to 50X1
O.lkll range. (0.CX)03% of reading + 0.2
digits)/X
1. 10 and 10O<n range: (0.0003% of reading *■ 0.02
dJglt$)/X
lOOOkn range (0.0005% of reading + 0.02
digit5)/X
lO.OOOkn range. (0.004% of reading + 0.02
digitsl/X
AccMracy: 4 wire k ohms* (I digit = .(Ml ^ of range)
24 hours; 23X ±1X
O.lkn range: :^(0.003% of reading + 4 digits)
Ikn range: ±(0.003% of readirtg + 1 di^)
lOkn range: ±(0.005% of reading + 2 digits)
lOOkn range: ±(0.002% of reading + 2 digits)
llXIOkn range: ±(0.012% of reading *■ 5 digits)
lO.OOOkll range: ±(0.1% of reading 5 digits)
90 days; 23X ±5X
O.lkO range ±(0005% of reading + 5 digits)
Ikn range: ±(0.005% of reading -f 1 di^)
lOkn range: ±(0007% of reading *■ 2 digts)
lOOkn range: ±(0.004% of reading 2 digits)
nXIOkll range: ±(0.014% of reading *■ 5 digits)
10.IXXH<n range. ±(0.100% of reading + 5 digits)
6 months; 23X ±5X
O.lkn range: ±(0.005% of reading -f 6 digits)
Ikn range. ±(0.005% of reading + 1 digH)
lOkn range. ±(0.007% of reading + 2 digits)
lOOkfl range ±(0.004% of readirtg *■ 3 digits)
lOOOkn range: ±(0.014% of readirtg * 5 digits)
lO.OOOkn range: ±(0.100% of reading -f 5 di^ts)
1 year; 23X ±5X
O.lkn range; ±(0.006% of reading + 7 digits)
Ikfl range ±(0.006% of reading + 2 di^ts)
lOkn rartge: ±(0.008% of reading + 3 digits)
KMkfl rartge ±(0 0(%% of reading * 4 digits)
lOOOkfl range ±(0.015% of reading 4 6 digits)
lO.OOOkn range. ±(0 100% of reading 4 6 di^)
Performance (High Resolution On)
Taaparatar* CoafflctaBt: (OX to SOX)
I. 10 and llX)kn range: ±(0.0003% of reading 4 0.2
digiti)/X
lOOOkn range: ±(0.0005% of reading 4 0.2
diglt$)/X
lO.OOOkn range: ±(0.004% of readirtg 4 0.2
digils)/X
Accaracy: 4 wire k ohms* (1 digit = .0001^ of range)
24 hours; 23X ±1X
Ikn range: ±(0.0025% of reading 4 4 digits)
KHtfl rartge ±(0.0045% of reading 4 4 digits)
lOCHtf) rartge. ±(0.0020% of reading 4 5 digits)
lOOOkn rartge: ±(0.0120% of reading 4 4 di^ts)
lO.OOOkn range: ±(0.1000% of reading 4 4 digits)
90 days; 23X ±5X
Ikn rartge: ±(0.0035% of reading 4 5 digits)
lOkO range: ±(0.0060% of reading 4 5 digits)
lOOkO rartge ±(0.0035% of reading 4 6 digits)
lOOOkn rartge: ±(0.0135% of reading 4 5 digits)
lO.OO^n rartge' ±(0.1000% of reading 4 5 digits)
6 months. 23X ±5X
Ikn range: ±(0.0040% of reading 4 6 digits)
lOkn rartge: ±(0.(X)65% of reading 4 6 digits)
lOOkn range: ±(0.0040% of reading 4 7 digits)
lOOCMtO range: ±(0.0140% of reading 4 6 digits)
lO.OOOkn rartge. ±(0.1000% of reading 4 6 digits)
1 year; 23X ±5X
Ikn range: ±(0.0045% of reading 4 7 digits)
lOkn range ±(0.0070% of reading 4 7 digits)
UXHtn range: ±(0.(X)45% of reading 4 8 digits)
lOOMn rartge: ±(0.0145% of reading 4 7 digits)
10.0(X)kn range: ±(0.1000% of reading 4 7 digits)
*AccBracy: 2 wire k ohms
All accuracy specifications are the same as 4 wire k ohms ex-
cept add 0.0()04kn to all readings.
Input Characteristics
NaaiMBM vohage ••■crated acrocc
■■kaowa:
<5 volts for open circuit
<4.7 vohs for valid reading
So«rc« Drltrlag UakaowB (NomIbcI):
Overload Protcciloa:
Non-Destructive — ±350V peak
MealMBM SeedlBg Rate:
MHa Gale Leegtk
ntk
High
■••olerioe
■••eleliee
Off
Ob
Lecel
4 S readings/ lec.
2 readings/sec.
■•vole
12 readings/ sec
3 teadlngs/sec.
5«Ha Gate Leeftk
Htak
High
■evltlee
■••olBiSee
on
Ob
Local
4 ieadings//sec.
1.8 readings/sec.
■a note
11 readings/sec
2.5 readings/sec.
Section i
Table 1-1. Specifications (Cont'd).
AC Voltage (RMS converter)
Model 3455A
M«sIh«b
DIaplay:
High Resolution High Resolution
On or Off On or Off
IV 149999V
lOV 14.9999V
lOOV 149 999V
lOOOV lOOO.OOV
R««f« 8«i •ctioo: Manual. Automatic, or Remote
Faactioa ACV or Fast ACV
Performance
Teoiperatprc Coafflclapt: (0°C to SOX) for inputs <50kHz
AC coupled. Input >1% of full scale ±(0 002% of reading * 2 diglts)/°C
AC coupled, input < 1% of full scale: ±(0 (X)2% of reading * 6 digft$)/°C
AC/DC coupled. ±(0.002% of reading + 6 dlgits)/°C
Accprocy: ±[ % of reading + digits or (% of rartgel ' (AC Coupling)’
FAST ACV* SSSHa-2SbH< SSkHs-ltSkHs lSSkHt-2SSkHt*
ACV* 3SHi-2SkHt 2SkH>-lS«kHi lSSkHi-2SSkHi>
2SSkHi-S0«kHi'
25SkHt.SS»kHa*
SSSkHt-lMHi*
SSSkHilMHt*
24 bra:2S-C ±TC
.04% -f 40 dig
0 4% * 80 (kg.
1.8% * 200 dig
4% -f 400 dig.
5% 2600 dig.
104%)
(08%)
1 (.20%)
(.40%)
(2.6%)
90 dava: 2S C ±S°C
05% SO dig
(.05 V»)
0.5% * 100 dig
(.10%)
20% * 250 dig
1.25%)
5% * 300 dig
(.50%)
6% * 3100dig
(3.1%)
Cae*:2SX ±5*C
1 v*ar;2S'C ±5°C
06% 60 dig
(06%)
07% ♦ 70 dig
(,07V»)
0.6% * 130 dig
(.13%)
0 7% * 160 dig
(16%)
2 1% > 300 dig
(.30%)
2 2% + 350 dig
(35%)
5.1% + 600 dig.
(.60%)
5.3% 700 dig
(.70%)
6.3% + 3S00dlg
(3.5%)
6.6% ♦ 3900dig
(3.9%)
MUSI be loMPoetf Su b*
^MtbiabBiis aav sisty k* npiA kveb aaow t' > *«A«e
r^M. eaupMMwb I % of hJ « kb ^ ?0 M kboa« «<WMC> lebb ewr«a
S'.sfktfwbv kM l7n*^Bkb0w«4i«M>««<b *
2 lue AC K <9U^if6 m#wik
CsMl Factor: 7 : 1 al full scale
Input Characteristics
lapat iBpadaaca:
Front Terminals— 2M0±1% shunted by less than l(X)pF
Rear Termiisals — 2MH± 1% shunted by less than 75pF
NaalwMB lapul Voltaga:
High to Low Terminals: ± 1414 volts peak (Subject to a
10^ voU • Hz limitation)
Guard to Chassis: ±S00V peak
Guard to Low Terminal ±200V peak
AC tt mmT si naWip • TOtaniBkbohO ««ur«> isbk vwepr
M AC DC atfut «b«e* bIbMr Mkd M ««b «M 1 4^ abMv ktfuiBv MNr
ef lOObHt 4Sr kpeerbed O 9>e I V and IIW tan^n
•Adt — r» m net ippcAad d <4m tw pBdvd aacaodi It)'
-Sony ■«iii »««>»>.
Navlaiaa Raadlag Rata:
SiHi Oaf Laagth
ACV I FAST ACV
Local 1.3 readings/sec 4 5 readlngs/see
1.3 readings/sec 13 readings/sec
SSHa Gaf LaaftS
ACV I FAST ACV
1 1 readings/sec 3.5 readings/sec
1 I readings/sec. 12 readings/sec
Raapoaae Tiaa:
ACV and FAST ACV
First reading to <0.1% of step size when triggered coinci-
dent with step change when on correct range.
(for AC signals with no DC component)
1-4
Model 3455A
Section 1
Table 1-1. Specifications (Cont'd).
AC Voltage (Average Converter Opt. 001 )
Raag**:
Maalnaai
Duplay:
High Resolution
On or Off
High Resolution
On or Off
IV
lOV
lOOV
lOOOV
1.49999V
14 9999V
149.999V
lOOO.OOV
Ranga Salactloa: Manual. Automatic, or Remote
Faactloa Salactloa: ACV ot Fast ACV
Performance
Taaiparatara Coafflciaat: (0°C to 50°C)
±(0.002% of reading + 2 di$ts)/°C
Accaracy: ±[% of reading + digits or (% of range)]'
FAST ACV*
ACVJ
SMHa-SMtb
SPHs-SPHa
SPPHa-lkHa
SPHa-lPtHa
IkMs-lPPkHa
IPPHs-lPPklU
lPPkHs-25PkHa*
lPPkHi-2SPkHa*
24 hr»: 22*C :1*C
0 47% + 70 dig
(.07%)
032% 50 dig
(.05%)
0.09% ♦ 25 dig
(025%)
0.70% 60 dig
(.06%)
9«days:2S°C :S°C
O.S0% ■* 70 dig.
(.07%)
0.35% 50 dig.
(.05%)
0.1% + 25<kg.
(.025%)
0.75% + 60 dig.
(.06%)
C aoe: 22°C ±5X
0.50% -f 70 dig
(.07%)
0.40% 60 dig.
(.06%)
0-1% ♦ 30 dig
(03%)
0.75% + 70 dig.
(.07%)
1 yt.i 2S°C ±S‘C
0.50% + 70 dig.
(.07%)
0 40% + 70 dig.
(.07%)
0.12% -i- 35 dig.
(.035%)
0.75% + 80 dig.
(.08%)
’Caart PHa retpurud M
Ob IOOOV ^4 01 9^ ydr • kH<
' Fsigapmias. yaaPM i*un lOQbHa an I and KM s g Afw
MesfKv R n Ri . d>«d d ^ *«fV ^ndwri 14
Input Characteristics
lapat iHpadaaca:
Front Terminals— 2Mfl±l% shunted by less than lOOpF
Rear Terminals — 2MO±l% shunted by less than 75pF
Maalaaa lapat Voltaga:
High to Low Terminals: ± 1414 volts peak (Subject to a
10^ volt • Hz limitation)
Guard to Chassis ±500V peak
Guard to Low Terminal ±200V peak
Mulaaai Raadlag Rato:
MHt Gate Laagih SPHa Gate LeagSb
ACV
FAST ACV
ACV
FAST ACV
13 teadir:gs/scc.
4.5 readtngs/sec
1 1 r«adings/sec.
3.5 leadings/sec
1 3 readings/ sec.
13 readings/ sec
M readings/sec
12 readIngs/sec
Reapoaea Tiaaa:
ACV and FAST ACV
First reading to <0.1% of step size when triggered coinci-
dent with step change when on correct range
(lor AC signals with no DC component)
J-5
Section I
Model 3455A
Table 1>1. Specificationi (Cont'dl.
Math
Sd«:
% Error: x 100%
X Is present reading Y and Z are previously entered read-
ings. numbers entered from Ihe troni panel or valuesentered
by external program.
NMBb«ri (Entered or Displayed)
±199.999 9
Accaracyi
± (ACCURACY OF X READING ±1 DIGIT OF DIS-
PLAYED ANSWER)'
■This assumes no "Y” or "Z" error.
X is present reading. Y Is a previously entered reading, or
number entered from the front pane) or by external program
MaalHMM Noabor: (Entered or Displayed)
±199.999 9
Acctarscyt
♦(ACCURACY OF X READING ± 1 DIGIT OF DIS-
PLAYED ANSWER)'
■This assumes no "Y” error.
Table 1-2, Typical Operating Characteristics.
Range SMactton: Manuel, Auiomalic.or Ramota
Function Salaetlon;
DC Volti
AC Voltl (ACV or FAST ACVJ
OHMS <2 wira kllohm or 4 wire kilohm)
TEST
NORMAL MODE REJECTION (50 Ht ORERATION)
NORMAL MODE REJECTION (60 HI OPERATION)
Efiective NoIk Bandwidlli * jj
T ■ 1 /60 Mc loi 5 digit 60 Hz Operation
T - 2/1S lecloi 6 digit 60 Hz Operation
T * t/SO aec for 5 digit 50 Hz Operation
T - 4/25 ICC for 6 digit SO Hz Operation
COMMON MODE REJECTION (I KILOHM IMBALANCE)
EFFECTIVE COMMON MOOE REJECTION (50 Hz OPERATION)
1-6
Model 34SSA
Section I
Table 1-2. Typical Operating Characteristics (Cont'd).
EFFECTIVE COMMON MODE REJECTION (60 Hz OPERATION)
Typical HF-IB Hsndihake Timei:
Accepi Data — I3455A addressed to listen or ATN true)
500 psec per character typical 19 delay tourcel
Output Data - (3455A addressed to talk)
250 Atec per character typical 10 delay acceptor)
Gefieral (Auto Cal must be on for 75 seconds to meet all
specifications)
Overload Irtdication: OL ^ ^
Operstiny Temperature: OCtoSOC
Warmup Time: One hour to meet all specifications
Humidity Range: < 95% R^H., 0 C t§ 40 C
Storage Temperature; —40 Ciot 75 C
Power; 100/120/240 V +5%, -10% 48 Hz to 400 Hz line
operation < 60 VA
220 V 1 10% 48 Hz to 400 Hz line operation
<60 VA
Dimensions: 88.9 mm high x 425.5 mm wide x 527,1
mm deep high x 16%" wide x 20%" deep)
Weights: Net -9 kg (21 lbs.)
Shipping - 12 kg (26 tbs.)
1-21. SAFETY CONSIDERATIONS.
1-22. The 34SSA is a safety class I instrument (provided
with a protective earth terminal). The instrument and man-
ual should be reviewed for safety symbols and instructions
before operation.
1-7
Section 1
Model 3455A
Table 1-3. Recommended Test Equipment.
Instrument
Critical Specification
Recommended Model
Use
DC Voltage Standard
Voltaga: 10 mV to 1000 V
Accuracy: i .005%
Syetron Donner
Model Ml 07
PAT
AC Calibrator
Frequency: 30 Hz to 100 kHz
Output Level: 100 mV to 1000 V
Accuracy: i .1 %
Voltage Stability <6 moi.) t .02%
-hp- Model 745A
AC Calibrator
hp- Model 746A
High Voltage Amplifier
PAT
Test Oscillator
Frequency: 10 250 kHz
Output: 3 V rms into 50 n
Frequency Response t .25%
-hp- Model 6S2A
Test Oscillator
P
Resistance Decade
Resistance: 100 n to 10 MD
Accuracy: t .004%
Gen Rad Model i
GR 1433-Z Decade
Resistor
PAT
DC Null Voltmeter
Voltage Range. 1 siV to 10 V
-hp- Modal 419A
PAT
Reference Divider
Division Ratio Accuracy t .001%
Output Voltage Range - 1 V 10 1 kV
Fluke Model 750A
Refereitce Divider
PA
DC Transfer Standard
Output Voltages: 1 V, 1 .018 V.
1.019V. 10 V
Accuracy: t 5 ppm
Stability: t .001% <30 daysl
Fluke Model 731A
DC Transfer Starrdard
PA
Electronic Counter
50 Hz to 60 Hz
-hp- Model S300A/S302A
Measuring System
P
ResKtance Standard
Resistance: 1 kfl
Accuracy : ± .0005%
Resistance: 100 K
Accuracy: ± .002%
Guildine Model
9330/1 K or 9330A/1 K
Guildline Model 9330/100 f
A
Bus System Analyzer
HP-IB Control Capability
-hp- Model 59401 A
Bus System Analyzer
T
Calculator
HP-IB Control Capability must
serve as printer for 3455A
Output data.
-hp- Model 9825A
OT
Oscilloscope
Bandwidth: DC to 10 MHz
Sweep Time: 0.1 ps to 1 sec/div
Sensitivity: 1 V/div
-hp- Model 180C/D
Oscilloscope with
IBOIAand 1821A
plug-in units
T
Digital Voltnteier
Voltage Range; 10 mV to 1000 V
Resolution: lOpV
-hp. Model 3490A
PAT
Raiisiori
Resistances:
1 kn * 10 %
10 kn 1 0.1%
1 Mn to.1%
-hp. Part No.
0684-1021
0698-4157
0698-6369
P
Signature Artalyzer
-hp- Model S004A
T
P ■ Performance Checks T ■ Troubleshootirtg
A - Adjustmems 0 » Operetors Check
1-8
Model 3455A
Section II
SECTION II
INSTALLATION
2-1. INTRODUCTION.
2-2. This section contains information and instructions
necessary to install and interface the Model 34S5A Digital
Voltmeter. Also included are initial inspection procedures,
power and grounding requirements, environmental informa-
tion, and repackaging instructions.
2-3. INITIAL INSPECTION.
24. This instrument was carefully inspected both mechan-
ically and electrically before shipment. It should be free of
mars and scratches and in perfect electrical order. The
instrument should be inspected upon receipt for damage
that might have occurred in transit. If the shipping con-
tainer or cushioning material is damaged, it should be kept
until the contents of the shipment have been checked for
completeness and the instrument has been mechanically
anJ electrically checked. Procedures for testing electric^
performance of the 3455A are given in Section IV. If the
contents are incomplete, if there is mechanical damage or
defect, or if the multimeter does not pass the Performance
Tests, notify the nearest Hewlett-Packard Office. (A list of
the -hp- Sales and Service Offices is presented at the back of
the manual.) If the shipping container is damaged, or the
cushioning material shows signs of stress, notify the carrier
as well as the Hewlett-Packard Office. Save the shipping
materials for the carrier's inspection.
2-5. PREPARATION FOR USE.
2-6. Power Requirements.
*em teOVMH
NOMINAL
VOLTAGE
OPERATING RANGE
- 10%, + 6% of nominal
FUSE
100 volts
90 to 105 volts
0.5 A
120 volts
10B to 126 volts
0.5 A
220 volts
198 to 231 volts
0.25 A
240 volts
216 to 252 volts
0.25 A
Figure 2-1. Line Voltage Selection.
used for -hp- power cables. The -hp- part number directly
below each drawing is the part number for a power cable
equipped with a connector of that configuration. If the
appropriate power cable is not included with the instru-
ment, notify the nearest -hp- Sales and Service Office and
the proper cable will be provided.
2-12. Grounding Requirements.
2-13. To protect operating personnel, the National Electri-
cal Manufacturer’s Association (NHMA) recommends that
the instrument panel and cabinet be grounded. The Model
34SSA is equipped with a three conductor power cable
which, when plugged into an appropriate receptacle,
grounds the instrument.
2-7. The Model 34SSA requires a power source of 100.
120. 220, or 240 V ac (+ S% - 10%). 48 I Iz to 400 Hz single
phase. Maximum power consumption is 60 VA.
2-6. Line Voltage Selection.
2-9. Before connecting ac power to the 34S5A, make sure
the rear panel line selector switches are set to correspond to
the voltage of the available power line as shown in Figure
2-1. Also, be sure the proper fuse is installed. The multi-
meter is shipped with the line voltage and fuse selected for
120 V ac operation.
FCAUTION;
Be sure ihe SO - 60 Hz rear panel switch is set
for the proper line frequency for your location.
2-10. Power Cable.
2-11. Figure 2-2 illustrates the standard configurations
2-14. Bench Use.
2-1 5. The Model 34SS A is shipped with plastic feet and tilt
stands installed and is ready for use as a bench instrument.
The plastic feet are shaped to permit “stacking” with other
2-1
Section II
Model 345SA
full-module Hewlett-Packard instruments. The till stands
permit the operator to elevate the front panel for operating
and viewing convenience.
2-16. Rack Mounting.
2-17. The Model 34SSA may be rack mounted by adding
rack mounting kit Option 908 or Option 909. Option 908
contains the basic hardware and instructions for rack
mounting; Option 909 adds front handles to the basic rack
mount kit. The rack mount kits are designed to permit
the Multimeter to be installed in a standard 19 inch rack.
When rack mounting, additional support must be provided
at the rear of the instrument. Be sure that the air intake at
the rear of the instrument is unobstructed.
2-18. Interface Connections.
2-19. The Model 34S5A is compatible with the Hewlett-
Packard Interface Bus(HP-IB).
NOTE
HP-IB is Hewlett-Packard's implementation of
IEEE std 488-1975, "Standard Digital Interface
for Programmable Instrumentation
The Multimeter is connected to the HP-IB by connecting an
HP-IB interface cable to the 24-pin connector located on
the rear panel. Figure 2-3 illustrates typical HP-IB system
interconnections and shows the 10631A/B/C HP-IB Inter-
face Cable connectors. Each end of the cable has both a
male and female connector to simplify interconnection of
instruments and cables. As many as IS instruments can be
connected by the same interface bus: however, the maxi-
mum length of cable that can be used to connect a group of
instruments must not exceed 2 meters (6.S ft.) times the
number of instruments to be connected, or 20 meters
(65.6 ft.), whichever is less.
2-20. Address Selection. The HP-IB address switch,
located on the rear panel, permits the user to set the “talk”
and “listen” address of the instrument. The talk and listen
address is a 7-bit code which is selected to provide a unique
address for each bus instrument. The 345SA normally
leaves the factory with the address switch set to a “Listen”
address of 6 and a “talk” address of V. The address switch
also allows selection of a “talk-only” mode. Refer to
Paragraph 342 for address selection instructions.
2-21. External Trigger. A BNC connector, located on the
rear panel, is provided for an external trigger input. The
trigger input is to be driven with TTL level signals.
2-22. ENVIRONMENTAL REQUIREMENTS.
WARNING
To prevent electrical shock or fire hazard, do
not expose the instrument to rain or moisture.
2-23. Operating and Storage Temperature.
2-24. In order to meet the specifications listed in Table
1- l, the instrument should be operated within an ambient
temperature range of 23'"C t S^C (73“F ± 9“F). The instru-
ment may be operated within an ambient temperature
range of 6°C to + 55®C (+ 32°F to + 131°F) with degraded
accuracy.
2- 25. The instrument may be stored or shipped where the
ambient temperature range is within — 40^C to *7S°C
(_40®F to +167'*F). However, the instrument should not
Figure 2-3. Typical HP-IB System Interconnections.
2-2
Model 34SSA
Section H
be stored or shipped where temperature fluctuations cause
condensation within the instrument.
2-26. Humidity.
2-27. The instrument may be operated in environments
with relative humidity of up to 95%. However, (he instru-
ment must be protected from temperature extremes which
cause condensation within the instrument.
2-28. Altitude.
2-29. The instrument may be operated at altitudes up to
4572 meters (15,000 feet).
2-30. REPACKAGING FOR SHIPMENT.
NOTE
// the instrument is to be shipped to Hewlett-
Packard for service or repair, attach a tag to the
instrument identifying the owner and Micating
the service or repair to be accomplished.
Include the model number and full serial num-
ber of the instrument. In any correspondence,
identify the instrument by model number and
full serial number. If you have any questions,
contact your nearest -hp- Sales and Service
Office.
2-31. The following is a general guide for repackaging the
instrument for shipment. If the original container is avail-
able. place the instrument in (he container with appropriate
packing material and seal well with strong tape or metal
bands, if the original container is not available, proceed as
follows:
a. Wrap instrument in heavy paper or plastic before
placing in an inner container.
b. Place packing material around all sides of instrument
and protect panel face with cardboard strips or plastic
foam.
c. Place instrument and inner container in a heavy
carton and seal with strong tape or metal bands.
d. Mark shipping container “DELICATK INSTRU-
MENT”, “FRAGILE", etc.
2-3
© © © ©
Section III
Model 3455A
FRONT PANEL
Line Switch, push on/push oM
HP-lS* status indicators:
SRQ - indicates that the 3455A "requires service" from
the controller. Refer to Paragraph 3-78.
LISTEN — lights when the 3455A is addressed to
"listen".
TALK — lights when the 3455A is addressed to "talk".
REMOTE — lights when the 346BA is under HP-18
control.
LOCAL switch — permits the operator to return the
instrument to local (front panel) control.
Display - Indicates polarity and amplitude of the
measurement. Measurement results are presented in either
S-l/2 digits or 6-1/2 digits depending upon whether the
HIGH RESOLUTION feature is off or on. An LED in the
upper left corner of the display indicates sample rate of
the 3455A. Five LED’s, located to the right of the dis-
play, Indicate whether the display it presenting DC Volt-
age, AC Voltage. Ohms. Scale or % error measurement
results.
Range Selection Keys - permit selection of ranges as
follows:
DC Volts: .1 V. 1 V, 10 V. 100 V. 1 kV. AUTO
AC Volts. 1 V. 10 V, 100 V. 1 kV. AUTO
Ohms: .1 K. 1 K. 10 K. 100 K. 1.000 K. 10.000 K. AUTO
LED's located in the center of the keys indicate which
range is selected.
Function Selection Keys - DC Volts, AC Volts. FAST
AC Volts. 2 WIRE kn. 4 WIRE kD. and TEST. LED's
located in the center of the keys indicate which function
it selected.
Auto Cal switch - allows the Auto-Cal feature to be turn-
ed on or off. LEO in center of Key indicates Auto-Cal on.
Refer to Paragraph 3-29.
Data Ready Request Indicator - lights when the Data
Ready Request feature is programmed on. Refer to
Paragraph 3-65.
High Resolution switch — switches display from 5-1/2
digit presentation to 6-1/2 digit presentation. An LED
located in the center of the key indicates High Resoiu-
tion on when lit.
Trigger Selection Keys - permits selection of INTER-
NAL. EXTERNAL, or HOLD/MANUAL trigger. Each
key has an LED which lights to indicate the trigger source
selected.
Sample Rate Controls — permit selection of maximum
sample rate or the present sample rate divided by 2. The
maximum sample rate may be divided by 2 up to 6 times
for a minimum sample rate of: maximum sample rate
Binary Program Indicator - indicates whan the 3455A is
operating in the Binary Program mode. Refer to
Paragraph 3-66.
Math Controls - Select SCALE ~ . % ERROR
X-Y ''
( X 100), or MATH OFF. The Math feature selected
Y
ia indicated by an LED located in the key (Paragraph
3-191.
ENTER controls ■ Recall the number stored in the Y or Z
register to the display, alao "ahifta" the from panel
keyboard to permit entry of new data to be stored in the
Y or Z registers (Paragraph 3-231.
STORE Controls - The Store controls transfer the
number presently being displayed into the Y or Z register
(Paragraph 3-23).
Rear Terminal Irxiicator • indicates when the rear input
tarminala have been selected.
Figure 3-1. Front and Rear Panel Features.
3-0
Model 3455A
Section III
SECTION III
OPERATING INSTRUCTIONS
3-1. INTROOUCTION.
3-2. This section contains information and instructions
necessary for operation of the Model 345SA Digital
Voltmeter. Included is a description of operation
characteristics, a description of the operating controls
and indicators, and functional checks to be performed
by the operator.
3-3. OPERATING CHARACTERISTICS.
3-4. Tara Oi) and Wana-Up.
3-5. Before connecting ac power to the 34S5A. make
certain the rear panel line selector switches are set to
correspond to the voltage and frequency of the available
power line and that the proper fuse is installed for the
voltage selected. For rated measurement accuracy, the
345SA should be allowed to warm up for at least one
hour.
3-B. Salt Tast Oparation.
logic of the instrument. When all these measurements
and calculations are completed, the 34S5A will display
+ . 8 . 8 . 8 . 8 . 8 . 8 . 8 . and the self-test operation will start
again. In order to bring the instrument out of this mode,
any other function button must be pressed.
3-8. In the event of a cal constant failure, the Self-Test
operation will stop and the failing cal constant’s number
will be displayed (an integer number from 13 to 0). If
the dummy calculation fails, a non integer number is
displayed (e.g., 9.998 or 10.002 etc.).
3-9. The Self-Test function can be remotely programm-
ed, as described in the programming portion of this sec-
tion. The 3455A will output a 10 upon a successful com-
pletion of the test and if addressed to “talk.” If the
dummy calculation fails, the answer of the dummy
calculation will be the output (9.998 or 10.002 etc.). If
any auto-cal constants fail, the 3455A will not output
any readings, (times out).
NOTE
3-7. The internal test function of the 3455A verifies the The self test feature does not test operation
operation of the dc analog circuitry, inguard and of the ohms or ac sections nor the measure-
outguard logic circuitry, and the front panel indicators ment accuracy of the 34S5A.
and display. The primary test of the dc analog circuitry
is the measurement of various Auto-Cal constants. A 3-10. DC Veltiga MNSureawnL
logic check is also performed, when all the cal constant
measurements are taken. The logic check consists of a 3-11. The Model 3453A measures dc voltage from 1
dummy cal constant calculation made in the outguard microvolt to KXX) volts in five ranges extending from .1
Ohms Signal Terminals • supplies drive signal lor
Line Frequency Selection Switch - must be set to corres-
4*WIRE Ohms measurements (Paragraph 3-12).
pond to the power liite frequency (SO Hz or 60 Hzl.
Input Terminals
@
Reference Module
®
GUARD switch - Internallv connects the Guard terminal
to the LO Input terminal (for front partel operation only,
@
EXTERNALTRIGGER Input Connector
Paragraph 3-411.
®
HP-IB* Address Selection Switch • refer to Paragraph
@
GUARD Terminal
3-63.
REAR PANEL
Cooling Fan
®
Ohms Signal Terminelt
®
Power Line Voltage Selection Switches — refer to Para-
graph 2-8.
®
Input Terminals
(S)
Fuse - 90 V to 126 V - 0.6 amp. 198 V to 262 V -
®
Guard Terminals
0.2S amp.
Front/Reat INPUT SELECT switch
®
AC Power Connector.
HP-IB* Connector - see Paragraph 2-18 and 3-48.
*HP-I0 IS Hewlett-Packard's implementation of IEEE Std.
®
AC or AC/OC Input Selection switch - refer to Paragraph
3-14.
488'197S. "Standard Digital Interface for Programmable
Instrumentation ".
Figure 3-1. Front and Rear Panel Features (Cont'dl.
3-1
Section III
Model 3455A
Figure 3*2. Ohmmeter Measurement Connections.
volt full-scale to 1000 volts full-scale. Measurement
results are presented in 5-1/2 digits during normal
operation or in 6-1/2 digits when the 34S5A is set to the
High Resolution mode. All ranges except the 1000 volt
range have 50^ overrange capability and are overload
protected from input voltages up to ± 1000 volts. Input
resistance in the dc function is greater than 10'^ ohms
on the .1 V, 1 V, and 10 V ranges and equal to 10
megohms on the 100 V and 1000 V ranges. Refer to
Table 1-1 for DC Accuracy specifications.
3-12. Rnistancs Maasuramant.
3-13. The Model 3455A measures resistance from 1
milliohm to 15 megohms in six ranges extending from .1
kilohms ful scale to 10.000 kilohms full scale. Measure-
ment results are presented in 5-1/2 digits during normal
operation or in ^1/2 digits when the 3455A is set to the
High Resolution mode. The only exception is that the .1
V range can only take a measurement in the 5-1/2 digit
mode. Resistance may be measured in “4-WIRE” con-
figuration for optimum accuracy or “2-WlRE” con-
figuration may be selected for measurement conve-
nience. Figure 3-2 shows proper connections for making
resistance measurements. The nominal output signal
current on the .1 kilohm, I kilohm and 100 kilohm
ranges is .7 mA. The nominal output current on the
1000 kilohm and 10,000 kilohm ranges is .7 microamp.
Maximum output voltage is limited to less than 5 volts
on all ranges. Refer to Table 1-1 for ohm accuracy
specifications.
3-14. AC Voltage Meaiuremont.
volts RMS. Readings taken in the ac function are
display in the 5-1/2 digit mode only. Input impedance
of both convertors is 2 megohms in parallel with
< 75 pF for rear terminal input and < 90 pF for front
terminal input. In addition to the normal ac volts func-
tion, the 3455A also has a fast ac volts function. The
fast ac function has a faster ac reading rate than the nor-
mal ac function.
3-16. The frequency response of the true RMS conver-
tor is from 30 Hz to 1 MHz in the normal ac volts func-
tion and from 300 Hz to 1 MHz in the fast ac volts func-
tion. Both ac signals or ac plus dc signals (ac signals
superimposed on a dc level) can be measured by the true
RMS convertor. Selection of the ac or ac -f dc inputs
are chosen by a switch located behind the rear panels
reference cover. Refer to Table 1-1 for accuracy
specifications of each ac mode.
3-17. The frequency response of the average converter
is from 30 Hz to 250 Hz in the normal ac volts function
and from 300 Hz to 250 kHz in the fast ac volts func-
tion. Only ac signals (no dc component) can be
measured by the average converter. Refer to Table 1-1
for accuracy specification of each ac mode.
3-18. In order to get accurate ac readings (especially
with high voltage inputs at high frequencies), the low in-
put terminal (front and rear) should be connected to the
guard terminal (front and rear). Refer to paragraph 3-39
for guarding information.
3-15. The -hp- Model 3455A offers a choise of true
RMS (standard unit) or average responding ac conver- NOTE
tors (Option (X)l). ^th methods measure ac voltages
from 10 microvolts to 1000 volts in four ranges exten- The front pane! guard pushbutton applies
ding from 1 volt to 1(XX) volts ranges. All ranges, except only for front panel inputs. Be sure to wire
the 1000 volts range, have 50% overrange capability and rear panel guard connections yourself, if us-
are protected from input voltage components up to 1000 ing the rear pane! input terminals.
3-2
Model 34SSA
Section ill
3-19. Math Featura.
3-20. The math feature of th 3455A allows the measure-
ment value to be offset and/or scaled by known values
or to be expressed in percent of a reference value.
3-21. Scala Mode. The scale mode of the math feature is
described by the formula: result = where x is the
y
measurement value, z is the offset value, and y is the
scale factor. This mode allows the measurement value to
be modified by the addition, subtraction, multiplication
or division of a known value. Addition and subtraction
are performed by entering the number to be added or
subtracted in "z” and entering I in “y”- The scale for-
mula then becomes: result « x - (A z) s x - (± z).
1
Division is performed by entering 0 in *'z’’ and the
divisor value in “y.” The scale formula then
becomes: result = x - 0 = x. Multiplication is perform-
y y
performed by dividing the measurement value by the in-
verse of the multiplier value; that is, multiplication is
performed by dividing by a fraction. The scale formula
becomes: result = . x - 0 = xy. As an example: to
1/y
multiply by 10, divide by the inverse of 10 which is 1/10
or .1. Various examples using the scale mode are as
follows:
a. Current Measurement: Accurate current
measurements can be made by using a low value resistor
shunting the 34S5A’s input terminals. The value of the
resistor is then entered in the “y” register (see
Paragraph 3-22), and zero is entered in the "z” register
With the resistor connected at the input terminal and the
instrument set in the voltage mode, current
measurements can now be made. You can do this by
connecting the input across the resistor and measuring
the voltage drop across the resistor. This voltage drop is
proportional to the current through the resistor. By
switching the 34SSA to the scale mode, the reading
becomes an accurate current reading in milliamps. Since
the resistor value is in kilo ohms (R) and stored in *‘y”.
and since zero is stored in *‘z", the scale equation
becomes:
x-y _ current in milliamps
y R R
where R = Resistor across the input terminals
V = Voltage drop across the resistor
b. Temperature Measurement: A temperature mea-
surement can be made by using a line or resistive
temperature sensor.
Assume that the sensor has a resistance of I kilohm at
25“C and changes 5900 ppm/*C. At 0®C the sensor
would have a resistance of 852. S ohm (1 kilohm - [5.9
ohms] 25). This number is divided by 1000 since the
34S5A measurement results are expressed in kilohm and
is entered in the “z” register to remove the offset at
0”C. The measurement result of (he 34S5A is scaled to
read directly in degrees centigrade by solving the equa-
tion for the value of “y”. This is done where the results
of the equation are equal to 25” C since the sensor
resistance is specified at that temperature. The scale
equation becomes:
25 = 1 K-.8525 K , .1475 K
y y y
solving for y:y = ^ = .0059 with this number
25
entered in the “y” register, the 3455A measurement
result will be presented directly in ”C.
c. Accurate 2 Wire Ohm Measurement: When trying
to make an accurate 2 wire ohm measurement, the input
lead resistance and the internal resistance of the 3455A
should be subtracted out from the reading. This is done
by setting the instrument to the desired range and short
the input leads at the measuring point. Store a 1 in "y"
and store the input lead resistance reading in "z”. Open
the input leads and connect the unknown resistor to the
leads. With the 3455A set in the Scale mode, the value
of the unknown resistor is displayed without the input
lead resistance. Since a 1 is stored in "y" and the lead
resistance (R) is stored in “z”, the scale equation
becomes:
^~y = = unknown resistance in ohms
Y 1
where x = total measured resistance including R
R = lead resistance
3-22. Error Mode. The error mode of the math
feature is described by the formula: result in g x-y x
y
100, where “x” is the present measurement value and
“y” is the reference value. An application of this
feature might be an inspection test of resist rs. This
nominal resistor value would be entered in the “y”
register in kilohm (3455A) resistance measurements are
presented in kilohm). As an example, assume the test is
made on a group of 750 ohm resistors with a tolerance
of 5^9 . The nominal resistor value (750 ohms) is entered
in the “y” register as .750. The error equation
becomes: result in •?# = X-.750 x 100. A resistor with
-m
an actual value of 790 ohms would give a measurement
result of: error = .790-750 x 100 * 5. 333331^0,
750
indicating the resistor is out of tolerance by .33333*7o.
d. Limit Testing: The Scale mode of the 3455A can
also be used to do Limit Testing. This can be ac-
complished since the largest number which can be
3-3
Seclion (II
Model 345SA
displayed is + 200,000 and the smallest number is
-200.00. If the magnitude of the display exceeds
200,000, either a “ + LL” or a **-LL” is displayed.
Therefore, the “y” and “z” constants must be chosen
so that when “x" (the reading) is equal to the upper
limit, the display is + 200,000 and when “x" is equal to
the lower limit, the display is -200,000. This can be ac-
complished as follows;
When X = the Lower Limit, the DISPLAY should =
• 200,000
When X = the Upper Limit, the DISPLAY should »
+ 200,000
therefore, -200,000 = Lower Limit • z
y
and + 200,000 = Upper Limit - z
y
This leaves two equations to solve for the unknown ”y”
and "z” constants. The two constants can be found the
following way:
3-23. Enter end Store.
3-24. The "Y” and “Z” ENTER keys have two func-
tions. When one of the enter keys is pressed, the number
presently stored in the respective memory register is
displayed on the front panel readout. This allows the
operator to check the contents of the “Y” or “Z”
memory registers. Pressing the enter key also “shifts”
the front panel keyboard, disabling all keys except those
labeled in blue. These keys can now be used to enter the
desired values to be stored in the "Y” or “Z” memory
registers. As the value is entered it is displayed on the
from panel readout. Numerical values from .OOOCXX) to
+ or - 199,999.9 may be entered in either the Y or Z
registers.
3-25. The STORE keys are used to transfer the number
presently being displayed in the “Y” or “Z” memory
registers and to return the voltmeter to normal opera-
tion.
3-26. The following describes how the ENTER and
STORE features may be used:
-200,(XX) (y)
+ 200,000 (y)
0
therefore, z
200,000
Lower Limit - z
Upper Limit • z
Lower Limit + Upper Limit -2Z
(add these two equations)
Upper Limit + Lower Limit
2
Upper Limit • z
y
200,000 (y) =
Upper Limit- UPP«r Limit + Lower Limit
2
Upper Limit • Lower Limit
2
and, y
Upper Limit - Lower Limit
400,000
The following is an example of how to use this math
technique. In this example a DC voltage is measured
and compared with a Lower Limit of 10 volts and an
Upper Limit of 30 volts:
y B Upper Limit - Lower _ 30-10 _ qqq ()5
400,000 400,000
, _ Upper Limit + Lower Limit _ 30 + 10 b 20
2 2
By entering .00005 into the “y” register and 20 into the
“z” register, and then pushing the SCALE and DCV
buttons, the 3455A becomes a limit testing DVM. If the
input exceeds 30 volts a “ + LL” is displayed, and if the
input is less than 10 volts a “-LL” is displayed. If the in-
put is within the limits set. a number is displayed.
a. To view the value presently in memory, press the
ENTER key of the appropriate register (ENTER Y or
ENTER Z). To return this number to memory, press the
STORE key of the appropriate register.
b. To enter a new number, press the ENTER key of
the register to receive the number. Enter the desired
number into the display by pressing the keys labeled in
blue. Store the number entered by pressing the STORE
key of the appropriate register.
c. To enter a measurement value presently being
displayed, press the STORE key of the desired register
(Y or Z).
NOTE
The operation of the ENTER and STORE
keys are not mutually exclusive. That is, the
number being displayed may be stored in
either the Y or Z register independently of
the register selected by the ENTER keys.
3-27. High Resolution Mode.
3-28. When the 3455A is used in the HIGH RESOLU-
TION mode, the instrument changes from a 5-1/2 digit
measurement to a 6-1/2 digit measurement. This
changes the measurement resolution from 10 parts/1.5
million (5-1/2 digit mode) to 1 part/1.5 million (6-1/2
digit mode). The integration period will also change
from 1/60 second (1/50 second for 50 Hz operation) to
8/60 second (8/50 second for 50 Hz operation). The
High Resolution mode cannot be used in the AC mode
or the .1 V DC and 1 K ohm ranges. The reading rate in
the DC and Ohms mode will also increase when the
High Resolution function is turned off. Table 3-1 gives
the various reading rates of the DC and Ohms functions
34
Model 345SA
Section Ml
with High Resolution turned on or off.
3-29. Aato-Cil.
3-30 The purpose of the AUTO-CAL feature is to
eliminate offsets, gain non-linearity, and drift which
maybe present in the analog measuring circuits of the
34SSA. This is accomplished by measuring the offset
and gain errors and then mathematically correcting the
measurement reading to exclude them. Each of the gain
and error measurements, called Auto-Cal constants, are
stored in the “memory” by the 3455A’s main con-
troller. These Auto-Cal constants are usually taken be-
tween each sample of the instrument and are updated
each time a new cal constant measurement is made.
3-29. The reading rate of the 34SSA increases when the
Auto-Cal feature is turned off. Table 3-1 gives the
reading rate of the various functions with Auto-Cal on
or off.
3-32. The last set of constants are used to correct
measurements, when the Auto-Cal mode is turned off.
As long as the input amplifier offsets, gain linearity
and drift do not vary the 34S5A should remain within
it’s accuracy specifications. The time period over which
these parameters will not change may vary from instru-
ment to instrument. When the Auto-Cal function is
disabled to obtain faster reading rates, it is recommend-
ed to periodically return the 34SSA to the Auto-Cal
mode in order to update the cal constants. This can be
done after a block of readings have been taken or when
the instrument is not in use. The instrument will then
update the cal constants for accurate measurements.
Allow about 6 seconds for updating the cal constants, if
the 34SSA is in the Hold mode.
3-33. Trigger.
3-34. The 3455A has three trigger modes. INTERNAL,
EXTERNAL, and HOLD/MANUAL. The following is
an explanation of each trigger mode.
a. Internal Trigger: This trigger is generated inter-
nally and triggers the 34SSA to lake a reading, after the
previous operation is completed (a reading or Auto-Cal
measurement). This trigger mode is entered when the in-
strument is turned on, when the Internal Trigger button
is pressed, or a Device Clear message is remotely sent.
b. External Trigger: When the 3455A is the External
Trigger mode, the user can trigger the instrument from
an external trigger pulse. This trigger pulse has to be ap-
plied to the rear External Trigger Connector and should
have a negative TTL edge and must be at least 3 seconds
wide. The instrument will take a measurement, when
this trigger pulse is received. After the measurement is
taken, the 34SSA can be triggered again for a new
reading. If the instrument is triggered while making a
measurement, the new trigger is delayed. After the first
measurement cycle is completed, the delayed trigger will
iniate a second measurement cycle. Only one trigger will
be delayed during any given measurement cycle. Any ex-
tra triggers sent during this cycle will be ignored.
c. Hold/Manual Trigger: This trigger is similar to
the External Trigger, except it can be executed by the
Hold/Manual button. The Hold/Manual button must
be pressed once in order to place the 3455A in the Hold
m<^e. After pressing the Hold/Manual button the se-
cond time, a measurement is taken. When the measure-
ment cycle is completed, the Hold/Manual button can
be pressed again for a new reading. It is important to
remember that the Hold/Manual button should be
pushed twice in order to take the first reading. If trig-
gered while a measurement is taken, the trigger is
delayed until the measurement cycle is complete. The
delayed trigger will initiate a second measurement cycle,
when the first one is completed. Only one trigger will be
delayed during any given measurement cycle. Any extra
triggers sent during this cycle will be ignored.
3-3S. Auto-Cal constants measurements also depend on
the Trigger mode used. An input reading and a cal cons-
tant measurement will alternately be taken, when the
34SSA is in the Internal Trigger mode. A typical se-
quence would be an input reading, one cal constant
measurement, another input reading, the next cal cons-
tant measurement, and so on. An attempt of this se-
quence (input reading/cal Constant measurement) is
^so made when the instrument is in the Hold/Manual
or External Trigger modes. If, however, a trigger is
received while a cal constant measurement is taken, this
measurement is aborted and an input reading is taken.
After this reading, the aborted cal constant measure-
ment is then retaken. If a new trigger is received before
the cal constant measurement is finished, the measure-
ment is again aborted and a new input reading is taken.
The cal constant measurement can be aborted a number
of times, depending on the function of the instrument.
The table below lists the number of times the cal cons-
tant measurements can be aborted. After this number
has been reached, the trigger will be delayed and the
Auto-Cal constant measurement is then completed.
Functiun
Miximum Number of Cel
Conetant Termination
DC 126
DC (High Resolutiont 32
AC Fast 64
AC Normal 8
Ohms 64
Ohms <H»gh Resolution) 1 6
These numbers are accumlative when Auto-Cal is on.
3-36. Sample Rate (Diaplay).
3-37. The SAMPLE RATE of the 3455A is set internal-
ly and depends on the function selected, the power line
3-5
Section 111
Model 34SSA
frequency, and use of the Auto-Cal and High Resolu-
tion modes. When the Sample Rate buttons are pressed,
the display rate of the reading are changed. By depress-
ing the Decrease 2 button on the front panel, the
display rate can be decreased. Each time this button is
pressed, the display rate is divided by two. The rate may
be divided a maximum of six times for a display rate of
1/64 of the maximum rate. The 3455A can be reset to
the maximum rate by depressing the maximum button,
after the display rate has been decreased. Table 3-1 gives
the maximum number of readings the instrument can
display on the front panel, in local operation.
Table 3-1. Maximum Front Panel Reading Rates.
Func
Function
High
Resolution
Auto
Calibration
Maximum Sample Rate
Maximum Sample Rate
DC Volts
ON
ON
3 readings/sec (60 Kzl
2.5 readings/sec (SO Hz)
OFF
ON
5 readings/sec (60 Hzl
3.5 readings/sac 150 Hz)
ON
OFF
6 readings/sec 160 Hz)
5 readings/sec ISO Hz)
OFF
OFF
24 readings/sec (60 Hz)
22 readings/aec (50 Hz)
Ohms
ON
ON
2 readir>gs/sec 160 Hz)
1.8 reading/sec (50 Hzl
OFF
ON
45 readings/sec (60 Hz)
4 readings/sec 150 Hzl
ON
OFF
3 readings/sec (60 Hz)
2.5 readings/sec ISO Hzl
OFF
OFF
12 readings/sec (60 Hz)
1 1 readings/sec 150 Hz)
AC Volts
Not
Applicable
ON
1.3 readings/sec (60 Hz)
1.1 readings/sec (50 Hz)
Not
Applicable
OFF
1.3 readings/sec (60 Hz)
1.1 readirtgs/sec (50 Hz)
Fast
AC Volts
Not
Applicable
ON
4.5 readings/sec 160 Hzl
3.5 readings/sec ISO Hz)
Not
Applicable
OFF
13 readings/sec (60 Hz)
12 readings/sec (50 Hz) |
3 3B. Auto Range.
3-39. The AUTO RANGE feature of the 3455A can be
used to automatically uprange and downrange the in-
strument to the optimum range. This action takes place
when an input measurement is taken. Upranging is dene
when the reading is ISO^e of full scale and downranging
at 14^0 of full scale. The Auto Range operation can be
observed by applying 1 .4 volts to the input of the
34SSA. The range selected by the instrument is the I V
range. When the input voltage exceeds 1.5 volts, the
345SA upranges to the 10 V range. When the input
voltage is decreased below 1.4 volts, the 1 V range is
again selected. The uprange points, the downrange
points, and the accuracy of the instrument should be
kept in mind when making a measurement. Time-
varient inputs may cause the 345SA to constantly
uprange and downrange. If this happens, manually set
the instrument to the higher range.
3-40. Measurement time may also change, when the in-
strument is in the Auto Range mode. If the instrument is
not on the optimum range, a reading is taken and the
34S5A will either uprange or downrange. Another
reading is then taken and if the optimum range has been
found the reading will be displayed. If not, the instru-
ment continues to uprange or downrange. A reading is
taken on all intermediate non-optimum ranges until the
correct range is found. The measurement time on each
range should be added to the total measurement time.
3-41. GUARDING.
3-42. Common-Modi Voltagoo.
3-43. Common-mode voltages are those which are
generated between the power line ground point of the
source and the LO input and power line ground point of
the 3455A. Currents caused by common-mode voltage
can be included in the measurement circuit, causing
measurement errors.
3-44. Guard CennKtion.
3-45. Figure 3-3 illustrates three methods of connecting
the 34SSA Guard terminal to reduce errors caused by
common-mode voltages, in example A, Guard is at
nearly the same potential as the LO measurement ter-
minal so that currents caused by common-mode voltage
flows through Guard and not the measurement circuit,
in example B, the 345SA guard switch is closed connec-
ting guard to the LO input terminal. This allows
common-mode current to flow through lead resistance
Rb causing some measurement error. This connection
may be used if common-mode voltages are not expected
to be a problem. Example C is similar to A with the ex-
ception that connecting guard in this manner allows any
common-mode current generated between the source
low and powerline ground to flow in the measurement
circuit.
NOTE
The from panel guard pushbutton applies
only for front panel inputs. Be sure to wire
rear panel guard connections yourself, if-
using the rear panel input terminals.
3-46. Guirding Information.
3-47. More detailed information on purpose and
methods of guarding may be found in -hp- Application
Note No. 123, “Floating Measurements and
Guarding”. This application note is available through
your nearest -hp- ^les and Service Office.
3-6
Model 34S5A
Section 111
Figure 3-3. Connecting the Guard.
^CAUTIONH
Guard should always be connected, either to
the instrument LO terminal or to a point in
the source circuit as indicated in Figure 3-3.
If the guard terminal is left open, common-
mode voltages may exceed the LO-io-Guard
breakdown rating and damage the instru-
ment.
3-48. REMOTE OPERATION.
3-49. General.
3-50. The Model 3455A is remotely controlled by
means of the Hewlett-Packard Interface Bus (HP-IB).
The HP-IB is a carefully defined instrumentation inter-
face which simplifies the integration of instruments,
calculators, and computers into systems.
NOTE
HP-IB is Hewlett-Packard’s implementation
of IEEE Sid. 488-1975, "Standard Digital
Interface for Programmable Instrumenta-
tion. "
3-5 1 . The capability of a device connected to the Bus is
specified by the interface functions it has. Table 3-2 lists
the Interface Functions included in the Model 34S5A.
These functions are also listed above the rear panel HP-
IB connector (see Figure 3-1). The number following the
interface function code indicates the particular capabili-
ty of that function as listed in Appendix C of IEEE Std.
488-1975.
Tabls 3-2. HP-IB Interface Capability.
Code
Inierfsce Function
SH1
Source Handihske cepebiliiv
AH1
Acceptor Hattdshake Capability
T6
Talker (basic talker, serial poll, talk only mode,
unaddiess to talk il addressed to listen)
L4
Listener (basic listener, unaddress to listen if
addressed to talk)
SRI
Service Reauesi Capability
RLl
Remote/Local Capability
PRO
No Parallel Poll Capability
DC1
Device Clear Capability
DTI
Device Trigger Capability
CO
No Controller Capability
El
Open Collector Bus Drivers
Interface Functions provide the means for a device to
receive, process and send messages over the bus.
3-52. Messages are the means by which devices ex-
change control and measurement information. These
messages permit communication and/or control bet-
ween:
Controller and Device(s)
Device and Device(s)
Controller and Controller(s)
Table 3-3 lists the Bus Messages and gives a brief
description of each. The messages are categorized by
Bus function.
3-53. Addrns Selaction.
3-54. The "talk” and "listen” addresses of the 3455A
are selected by the INSTRUMENT ADDRESS switch.
This switch is a seven section "Dip” switch located on
the rear panel (sec Figure 3-1). The five switches, labeled
I through 5 are used to select a unique talk and listen ad-
dress. Figure 3-4 lists the available address codes and the
corresponding switch settings. The 3455A normally
leaves the factory with the switch set to listen address 6
and talk address V (decimal code 54).
3-55. Talk Only (No Controllar). The 3455A may be used to
provide measurement data to another device, such as a
printer, without having a controller on the Bus.
However, the device must be HP-IB compatible. The
talk only switch must be set to the TALK ONLY posi-
tion. In this mode the 3455A will output measurement
3-7
Section III
Model 345SA
Table 3-3. Bus Massaeat.
Function*
Message
Description
Device
Communicsiion*
Data
Transfers device-depettdent infor-
mation from one device to orte or
more devices on the Bus.
Device
Control
Trigger
Cause* a group of selected devices
to simultaneously imitate a set of
device^ependent actions.
Clear
Causes an instrument to be set to
a pre-defined state la certain
range, function, etc.).
Remote
Permits selected devices to be set
to remote operation, allowing
parameters and device cKaracteris-
tics to be controlled by Bus
Messages.
Local
Causes selected devices to return
to local (front panel) operation.
Local
Lockout
Disables local (front panel) con-
trols of selected devices.
Clear
Lockout
and
Local
Returns all devices to local (front
panel) control and simultaneously
clears the Local Lockout Message.
Interrupt
and
Rptriro
Require
Service
Indicates a device's need for inter-
action with the controller.
Status
Status
Byte
Presents status information of a
particular device; one bit indioetes
whether or not the device current-
ly requires Service, the other 7
bits (optional) are used to indi-
cate the type of service required.
Status
Bit
A single bit of device-dependent
status information which may be
logically combined with status bn
information from other devices
by the controller.
Passing
Control
Pass
Control
Passes bus controller responsibili-
ties from the current controller to
a device which can assume the
Bus sutwrvisory role,
Bail
Out
Abort
Unconditionally terminates Bus
communications and returns con-
trol to the system controller.
data each time a measurement sample is made. Section
of FUNCTION. RANGE. TRIGGER, etc. is ac-
complished manually using the front panel controls.
NOTE
When the 34SSA is connected to a system
with a controller, the TALK ONLY switch
must be set to the off position.
3-56. Program Codas.
3-57. All front panel controls, except the LINE switch,
GUARD switch, and SAMPLE RATE switches, are
programmable from the Bus. The program codes for
each control are listed in Table 3-4. The program codes
can also be determined from the front panel markings.
For multi-control features such as FUNCTION,
RANGE, TRIGGER, and MATH the program code
consists of the combination of the underlined letter in
the control group heading and the position number of
the particular control. See the following example:
CONTROL GROUP CODE
(UNDERLINEOI
UfgCTION —
tviAC
>wv bO
□ □ □ □
POSITtON 1
PROGRAM FI
CODE
2 3 4
F2 F3 F4
«WII| i
>0 Ttit
□ □
S 6
F5 F6
3-8
Model 34S5A
Section III
Tables^. HP-IB Program Codes.
Progratrt
Control
Code
DC Volti
FI
AC Volts
F2
FUNCTION
Fast AC Volts
F3
2 Wire kR
F4
4 Wire kR
F5
Test
F6
.1
R1
1
H2
10
R3
RANGE
100
R4
1 K
R6
10 K
R6
AUTO
H7
Internal
T1
TRIGGER
External
T2
Hold/Manual
T3
Scale
Ml
MATH
Error
M2
Oft
M3
ENTER
Y
Z
EY
EZ
STORE
Y
2
SY
SZ
AUTO CAL
Off
On
A«
Al
HIGH
Off
HO
RESOLUTION
On
HI
DATA
Off
00
READY RQS
On
Dl
BINARY
PROGRAM
B
3-58. The program code for single control features
which can only be programmed on or off (AUTO CAL
and HIGH RESOLUTION) consist of the letter
underlined in the control heading and the number “0”
for off or the number **l” for on. This also applies to
the DATA READY Request feature which is Bus pro-
grammable only.
Example:
0 = off
1 = on
Program Code
(ofO
(on)
3-59. Program codes for the ENTER and STORE
features consist of the letter underlined in the control
control code
(underlined)
AUTO
CAC
□
PATA
■CAOr
BOS
94H
A0
Al
1X9
Dl
heading and the underlined letter of the particular con-
trol.
Example:
control group code
(underlined)
CNTCN
control codes
(underlined)
^ad«-47«4
program code EY EZ SY SZ
3-60. The program code of the BINARY PROGRAM
feature consists of only the underlined character in the
control heading (B).
3-81. Data Maataget.
3-62. The major portion of communications transmit-
ted over the Bus is accomplished by data messages. Data
messages are used by the controller to program the
Model 34SSA and are used by the 34SSA to transmit
measurement data. These functions are explained in the
following paragraphs.
3-83. Programming. The 345SA is programmed by means
of data messages sent over the Bus from the controller.
These messages are composed of two parts — the ad-
dress command and the program information. The ad-
dress command contains the "talk” and “listen” ad-
dresses of the devices involved; in this case, the talk ad-
dress of the controller and the listen address of the
34S5A. The program information contains the codes of
the 345SA controls to be programmed. Syntax of the ad-
dress command portion of the data message is depen-
dent upon the controller being used. For the proper syn-
tax refer to the controller manual. Syntax for the pro-
gram information portion consists of the program codes
listed in Table 3-4.
Example program data messages:
Address
Command
3455A Program
Infonnation
CMD-’Ub". -FI R3 M iiJ M3 13
output to J
the bus
unlisicn
command
controller _
“talk" address
3455A
“listen" address
I HOLD/
••MANUAL
TRIGGER
-MATH off
HIGH RESOLUTION
on
AUTO CAL off
10 V RANGE
DC Volts FUNCTION
Program data message using the 9830A Calculator.
3-9
Section III
Model 3455A
Address 3455A Program
Command Information
wrt 722. -FI R3 A0 Hi M3 T3"
3455A listen
L — ■ - address
output to the (decimal equivalent)
bus, includes
the unlisien command
and calculator talk
address
Program data message using the 982SA Calculator.
3-64. Eataring MATH Censtants (Y and Z) from tha Bat. The
following data message illustrates the program informa-
tion necessary to enter numbers into the Y and Z
registers:
Address Program
Command Information
(refer to Controller
Manual)
'EY 123.456 SY EZ 45.6789 SZ "
Enters number
in “Z” Register
Programs the
L 3455A to store
the displayed
number in the
“Y” Register.
Number to
be entered
Programs the
3455 A to enter
numerical data
into the display
addresses controller to
“talk" and 34S5A to “listen”
The number stored in the Y or Z register can be read
from the Bus by programming the ENTER feature and
the particular register. This transfers the number from
the storage register specified to the display. The number
displayed is output to the Bus by addressing the 34S5A
to "talk". The number is returned to the storage
register by programming the STORE feature and the
desired register. The following example illustrates how
to read the numbers stored in the Y and Z register from
the Bus:
Address
Command
wrt 722 . “EY"
Addresses the
controller (9825A)
to “talk" and the
3455A to “listen”
Transfers the number
stored in the Y register
into the 3455A display
red 222 . A ; ^
P A
Addresses
the 34S5A
to “talk" and 1
the controller
(9825A) to
“listen”
Outputs the contents of
the controller’s “A" register
to the display
Specifics the
controller register
to receive the
number
wrt 722 . "SY"
Addresses the Returns the number in
controller (9825A) to J the 3455A display to the Y
"talk" and the 345SA register
to "listen"
3 85. Data Raady Raquaat The DATA READY Request
feature permits the 34S5A to signal the controller upon
the completion of a measurement. This feature would
normally be used where the 3455A is triggered from an
external source. In this mode of operation, the 34SSA is
programmed to the appropriate measurement
parameters (FUNCTION, RANGE, etc.). The con-
troller is then free to control other instruments on the
Bus. Upon being triggered, the 3455A makes a measure-
ment and outputs a “Require Service" message to
notify the controller that the measurement information
information is ready. Upon receiving the service re-
quest, the controller with serial poll the 34SSA to deter-
mine the nature of the service request. Upon being poll-
ed, the 3455A outputs a status byte, in this case the
ASCII character “A" (decimal 65), indicating the
measurement data is ready. The controller then disables
the serial poll and reads the measurement data. The pro-
gram codes for the DATA READY RQS feature are:
D0 Data Ready Request off
Di Data Ready Request on
3-66. Binary Program Faatara. The BINARY PROGRAM
feature permits the status of the FUNCTION, RANGE,
TRIGGER, MATH, AUTO-CAL and HIGH RESO-
LUTION controls to be determined or programmed
from the bus in four 8-bit binary words. The BINARY
PROGRAM feature allows faster programming of the
345SA by reducing the number of program data bytes
from a maximum of 12 for normal programming to 4
data bytes for binary programming. The BINARY
PROGRAM codes can also be read and stored by the
controller to re-program the 345SA at a later time (see
Appendix A). One important thing to remember is to
send a "B" to the 3455A in order to put the instrument
into the BINARY mode. Table 3-5 lists the allowable
BINARY PROGRAM codes for each of the four data
bytes and the front pane] keys they control.
3-10
Model 3455A
Seclton 111
3-67. The following data message examples illustrate
how to read or program the front panel control of the
Table 3-5. BINARY PROGRAM Codes.
f irti BINARY enOGRAM 0*u Byla
ControH AIfKtM. SCALE, % ERROR. OFF IMATHl
To f
1 Pro«i*ni CoBc
ASCII
CHAR
DECIMAL
CODE
OFF
ss
TERROR
•
61
SCALE
>
62
Second BINARY PROGRAM 0>i< Bv<«
Control* AfftciM AUTO CAL. AUTO RANGE. HIGH RESOLU
TION. HOLD/MANUAL. EXTERNAL. INTERNAL
To Proflrtm
PROGR
AM CODE
AUTO
AUTO
HIGH
ASCII
1 DECIMAL
CAL
RANGE
RESOLUTION !
TRIGGER
CHAR
' CODE
Oil
Oil
OH
HoM)/U»nu*l
SB
EkMrn«l
-
61
Innrnkl
>
63
Oil
Oil
On
HoM/Mnuai
3
St
Ekt*m*l
6
S3
lni«rn*l
6
S4
Oil
On
OH
Hold/M»nutl
♦
43
EABrnil
-
4S
46
Oil
On
On 1
Hold/Mnnuil
#
3S
ExtarA*!
%
37
Internal
B
38
On
Oil
OH
f^nuai/Hold
1
01
Extarnal
1
03
Internal
04
On
on
On
Manual/ Hole*
S
63
Enarnal
U
SS
Internal
V
86
On
On
OH
Manual /Ho*d
K
75
External
M
77
Internal
N
78
On
On
On
M«nutl/Hola
C
67
EiTarna*
E
60
Incernal
F
70
TNva BINARY PROGRAM Ool* Bvie
Control* AfIcciM’ 10 K, 1 K, 100. 10. 1, I (RANGE)
To Fro 9 ra«n
1 Pro^remCotfe
ASCII
CHAR
DECIMAL
CODE
to K
_
05
1 K
/
47
100
7
SS
to
SB
1
•
61
1
>
62
Fourlh BINARY PROGRAM Oou Bvtt
Conitoli AlloeiM TEST. 4 WIRE kO. 2 WIRE kO. FAST ACV.
ACV, OCV IFUNCTIONI
To Frogrem.
1 Profxm Cod*
ASCII
CHAR
DECIMAL
CODE
TEST
_
05
4 WIRE kfl
/
47
3 WIRE ktl
7
56
FAST ACV
S0
ACV
-
61
DCV
>
63
3455A. To read control status:
wrt 722. “B”
Address the
3455AIO
"listen"
Set the 345 SA to (he
BINARY PROGRAM
mode
Since normally four data bytes are used in Binary pro-
gramming, the 345SA may indicate an SRQ condition
when only a “B” is sent.
red 722
Address the 3455A I
to "talk”
The 3455A, after receiving the "talk” command, will out-
put the front panel control status codes (4 bytes). As an
example, if the front panel controls were in the "turn-on”
state, the 3455A would output the following codes:
N
MATH OFF
AUTO CAL ON
AUTO RANGE ON
HIGH RESOLUTION OFF
INTERNAL TRIGGER
>
1 DC Volts FUNCTION
1 Volt RANGE
(depends on input applied)
To program front panel controls:
wrt 722, "B ;K/ =
Address the
3455Ato *
•listen”
Sei3455Ato
BINARY PROGRAM
mode
Desired program
codes (see Table 3-5)
3-68. MMBurMMflt Data. Measurement data is output by
the 3455A in the following general format:
OUTPUT FORMAT:
Polarity of measurement
(does not apply to ACV
or OHM measurements)
± nnnnPDDE t ddcrlf
CRLF
Terminates
message
Measurement reading I
expressed in scientific ‘
notation
This format is printed in the lower left corner of the
3455A front panel for convenience. The following is an
example of a data message output by the 3455A:
Section III
Mode! 3455A
Input to 345SA: -143.5 volts DC
Output Data Message: -1.435000 E -t- 02 CR
LF
The 3455A will output a measurement data message
when addressed to “talk**. The syntax for addressing
the 3455A is dependent upon the controller being used.
Refer to the Operating Manual of your controller for in-
structions.
NOTE
An overload measuremeru is indicated by an
E ■¥ 10 exponent in (he HP-IB measurement
data. The large exponent is (he key.
Also, note that the LF character (concurrent
with EOl) is the last character in the data
message and must be handshook from the
34SSA to complete (he measurement
transfer.
3-69. Davies ContrgI Messages.
3-70. Device control messages are issued by the system
controller to manage instruments on the bus. These
messages are controller dependent. For specific infor-
mation as to syntax and procedures to transmit the con-
trol messages, refer to the Operating Manual of the con-
troller being used.
3-71. The following paragraphs describe the 3455A
response to the various control messages.
3-72. Trigger Meessge. The trigger message causes the
3455A to initiate a measurement cycle. The 3455A must
be addressed to “listen” in order to recognize the trigger
message. The measurement results of the 3455A depend
upon the control settings (FUNCTION, RANGE, etc.)
at the time the trigger message is received.
3-73. Clear Masuga. Upon receiving the clear message,
the 3455A sets the front panel controls to their “turn-
on” state. The turn-on state is as follows:
FUNCTION DC VOLTS
RANGE AUTO
TRIGGER INTERNAL
MATH OFF
AUTO CAL ON
HIGH RESOLUTION OFF
DATA READY RQS OFF
BINARY PROGRAM OFF
The 345SA will respond to the device clear message
whether addressed to “listen” or not. To respond to the
selected device clear message, the 3455A must be ad-
dressed to listen.
3-74. Remote Message. The 3455A will go to Remote
(Bus) control when the remote message, in conjunction
with its “listen” address, is received. Remote operation
is indicated when the REMOTE indicator, located
above the display, is lit. During remote operation, the
front panel controls cannot be operated manually.
3-7S. Local Message. The local message returns the
3455A to LOCAL (manual) control. The 3455A can
also be returned to local control by pressing the front
panel LOCAL button. Some circuits of the instrument
may also be in local operation when a local message is
send to another instrument on the HP-IB.
7-7B Local Leckoet Message. The local lockout message
disables the front panel LOCAL control. In the local
lockout mode, the 345SA cannot be returned to local
operation from the front panel.
3-77. Clear Lockout and Local Message. The 3455A will set
the front panel to LOCAL (manual) operation and
enable the LOCAL control upon receiving the clear
lockout and local message.
3-78. Intemipt end Device Status Massages.
3-79. The interrupt and device status messages permit
the 3455A to notify the controller when an error in pro-
gramming information or measurement output data oc-
curs. The 3455A also uses these messages to notify the
controller when measurement data is available if the
DATA READY REQUEST feature is programmed.
3 80. Rsquira Service Message. The following conditions
will cause the 345SA to output a Require Service (SRQ)
message.
a. Data Ready. If the DATA READY REQUEST
feature is programmed, the 3455A will output an SRQ
message upon completing the required measurement.
b. Syntax Error. The 3455A will output an SRQ
message if a program code other than those listed in
Table 3-4 is received. For example, the program code
“F7” would cause a syntax error since the FUNCTION
program set only contains codes FI through F6.
c. BINARY PROGRAM Error. The 3455A will out-
put an SRQ message if a BINARY PROGRAM code
other than those listed in Table 3-5 is received.
d. Trigger Too Fast. An SRQ message will be output
if the 34S5A is triggered while outputting data to the
bus. This condition most commonly occurs if the 3455A
is programmed to INTERNAL TRIGGER during bus
operation. The front panel SRQ indicator is lit when the
3455A requires service. The Require Service message
can be cleared by serial polling the 3455A or by clearing
the 3455A.
-'•12
Model 34SSA
Section 111
3-8t. Statdi Bytt M«t» 9 e. The status byte message is
output by the 34SSA in response to a serial poll and in-
dicates, to the controller, the nature of a service request
message (SRQ) from the 34SSA. The following is a list
of the basic status byte codes output by the 34SSA;
Status Byte Code
ASCII ^ ,
CHAR
A
6S
Data Ready • indicates to the con-
troller that rneasuremeni data is
available. Applies to DATA
READY Request feature.
B
66
Syntax Error - Indicates improper
1 program code. Example ■ Pro-
gram Code "F7" would cause a
, syntax error since the FUNC-
1 TION program set is only defined
for codes FI through F6.
D
68
1
' BINARY FUNCTION Error - In-
dicates improper BINARY PRO-
GRAM code or incomplete binary
message. Similar to syntax error.
H
! 72
Trigger too Fast • Indicates the
3455A has been triggered while
measurement data is being output
to the bus. Warns of possible in-
correct measurement information.
it is possible for more than one of the basic status byte
messages to be true. In this case the resulting status byte
code would be the combinttuion of the basic status byte
codes being output. As an example, the resulting ct^e
for the combination of the syntax error and trigger too
fast messages would be ASCII character J decimal code
74. The following illustrates the status Byte message in-
dicating the purpose of each relevant "bit".
STATUS BYTE MESSAGE
3-B2. DATA OUTPUT CHAFIACTERISTICS.
3-83. The protocol used by the 34SSA to output
measurement data must be followed in order to preserve
proper data transfer over the HP-IB, the following
notes on data transfer over the HP-IB may be helpful:
a. If a reading has been taken and thus resides in the
output buffer, the buffer is not considered busy until
the output handshaking begins. Thus, a new trigger will
indicate a measurement and the new reading will replace
the old reading. The old reading is lost and there is no
SRQ condition.
b. Once the Hrst character of measurement data has
been handshaken out, the buffer is considered busy un-
til one of the following occurs:
1. The balance of the reading is handshaken out.
2. “Device" or "Selected Device" clear is given.
3. The 34SSA power is interrupted, triggering
white the buffer is busy will lose the new
reading and cause a "Trigger too Fast” SRQ
condition.
c. When triggering and taking measurements in a
loop, sufficient time must be allowed for the 345SA to
perform the entire A-To-D measurement cycle and buf-
fer data to become available after the first reading. The
"Wait" statements in many 9800 series calculators are
convenient methods to avoid outputting the previous
buffer contents. This condition shows up as being "One
reading behind" in your measurement sequence.
d. If you know the output buffer is not busy, but
don't know whether it is full or not, sending a "device"
or selected device" clear followed by reprogramming
the desired conditions is a safe way to clear the output
buffer.
3-14. Bail Out MessagB.
3-15. Abort. The Abort message unconditionally ter-
minates all Bus communications and returns control to
the system controller. Only the system controller can
send the Abort message. Refer to the Operating Manual
of the controller being used for instruaions on sending
the Abort Message.
3'BB. Instrumont Mtaauroffloiit Timoi (Remots Control).
3-87. In the Remote Operating mode, the 34SSA takes a
certain amount of time to respond to a trigger message.
The overall time depends on the range, function, and
particular controller used. This time may also vary from
instrument to instrument. Table 3-6 gives the typical
measurement times, using the HP-IB. These times are
not part of the operating specifications of the instru-
.'•l.l
Section III
Model 3455A
ment, and are only provided as additional information
for HP-IB system use. The following is an explanation
of the various times involved in a measurement se-
quence.
troller), HPL (-hp- Model 982SA Controller) and
Enhanced Basic (-hp- Model 983SA/B and 9843A/B
Controller) languages. The examples in the Appendix
can be helpful when you write programs for the 34SSA.
a. ij (Typical Input Data Transfer Time): This is the
typical time it takes to transfer input data (set the 34S5A
to a certain function and range, etc) from a controller to
the instrument. The transfer time depends on the num-
ber of ASCII character send to the instrument and the
response lime of the controller. For example, to send an
"FIT3” message to the instrument lakes four charac-
ters.
b. l2 (Typical Input Settling Time): The instrument
is triggered (HP-IB, External, or Hold/Manual Trigger)
and the 3455A begins to take a reading. This time con-
sists of the settling lime of the input relays, FETs, and
other circuits.
c. t3 (Typical Measurement Time): The input mea-
surement is taken at this time. This includes the A-to-D
conversion time.
d. l4 (Typical Compulation Time): When the
measuring and the A/D operations are completed, the
instrument’s internal main controller circuits calculates
the correa measurement reading. This time is the
amount of the time it takes to complete the calculation.
d. IS (Typeial Output Data Transfer Time): The
34SSA now sends the reading to the HP-IB output buf-
fers to be transferred to the controller. This time also
depends on the response time of the particular con-
troller.
3-18. Renata Pragraomiag Exinplat.
3-89. Appendix A at the end of this manual has Remote
Programming examples for the 34SSA. These examples
are given in the HP Basic (-hp- Model 9830A/B Con-
3-80. OPERATORS CHECKS.
3-91. The TEST feature provides a convenient method
of testing the basic operational capabilities of the Model
34SSA. This test plus an operational check of the Ohms
and AC functions tests the major portion of the 34SSA
circuitry. Keep in mind the following checks lest only
the operating capability of the 34SSA. They do not
check the performance accuracy.
3-92. BENCH USE.
3-93. The following sequence may be used to manually
check operational capability of the 34SSA.
a. Set the 3455A to AUTO RANGE.
b. Press the TEST button. The display should be
blank while the 34S5A is performing the self test. Upon
successful completion of the test, all front panel in-
dicators (except the REAR TERMINAL indicator) will
light and a reading of + 8888888 with all decim^ lit
will be displayed. The self test will be repeated until
another function is selected.
c. Connect a short across the INPUT terminals.
d. Press the 2 WIRE kO button. The front panel
display should read .00000 ± 300 milliohms.
e. Press the ACV button. The display should read
.00000 ± 600 microvolts.
3-84.HP-IB OpwitiM.
3-93. Figure 3-3 shows the steps necessary to perform
the 34SSA operators check from the Bus.
Tabla 3-6. Typical HP-IB Coatrollad Maasaremant Tiract.
' ' 1
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9l
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144 mme f«r 100 8A4
niG
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B'g '
illaaae
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14
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«.»
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ni« '
TT^
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40 He
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^••1 AC Ven«
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Model 3455A
Section IV
SECTION IV
PERFORMANCE TESTS
4-1. INTMOUCTIOII.
4-2. This section contains performance and operational
verification test procedures which can be used to verify
that the 345SA meets its published specifications (listed
in Table M). All tests can be performed without access
to the interior of the instrument. The performance tests
in this section do not test the 345SA Math Functions or
HP-IB Interface. These functions can be tested using
the operators test procedures included in Section III.
4-3. EQUIPMENT REQUIRED.
4-4. The test equipment required for the performance
tests is listed at the beginning of each procedure and in
the Recommended Test Equipment Table in Section I.
If the recommended equipment is not available, use
substitute equipment that meets the critical specifica-
tions given in the table.
4-S. PERFORMANCE TEST CARD.
4-6. Performance Test Cards are provided at the end of
this seaion for your convenience in recording the per-
formance of the 34S5A during either test. These cards
can be removed from the manual and used as a perma-
nent record of the incoming inspection or of a routine
performance test. The Test Cards may be reproduced
without written permission from Hewlett-Packard.
4-7. CALIBRATIDN CYCLE.
4-8. The 3455A requires periodic verification of perfor-
mance. The performance should be tested as part of the
incoming inspection and at 90-day or 6-month intervals,
depending on the environmental conditions and your
specific accuracy requirements. Two tests (performance
and opertional verification) are provided in this section.
The operational verification test should be performed as
an incoming inspection of the instrument. The complete
performance test can be used at the 90-day or 6-month
intervals, and following a complete calibration of the in-
strument.
4-9. INPUT TERMINALS/CONTROL SEHINQS.
4-10. Unless otherwise specified, the test signals for the
performance tests can be applied to either the front or
rear INPUT terminals. All tests must be performed in
the INTERNAL Trigger Mode with AUTO CAL on and
MATH off. For standard instruments (rms converter)
the rear panel AC - AC/DC switch must be in the ac
position. Other control settings are included in the test
procedures.
4-11. PERFORMANCE TEST FAILURE.
4-12. If the 3453A fails any of the performance tests or
operational verification test, perform the adjustments
outlined in Section V. If the problem cannot be cor-
rected by the adjustment, refer to Section VIII for
troubleshooting information.
4 13. SPECIFICATION BREAKDOWN.
4-14. The dc, ac and ohms accuracy specifications
(Table 1-1) are grouped according to the selected instru-
ment function, i.e.. High Resolution On or Off, ACV
or Fast ACV and 2-Wire or 4-Wire ohms. Within each
group there are three sets of specifications:
a. 24 hour (23*C ± PC)
b. 90 day (23°C ± 5®C)
c. 6 months (23*C ± 5*Q
4-15. The time period over which a set of specifications
applies is relative to the time the instrument is initially
adjusted at the factory or is properly readjusted accor-
ding to the procedures outlined in Section V. Before
proceeding with the dc, ac and ohms accuracy tests, it
will be necessary to determine which set of specifica-
tions applies to your instrument. If the instrument has
just been received and is to be tested as part of the in-
coming inspection, test for the 90-day specifications. If
the instrument has been readjusted within a period of 24
hours, test for the 24-hour specifications. Test limits for
the 24-hour and 90-day specifications are included in the
tables for the accuracy tests. Test limits for the 6-month
specifications must be derived from the specifications
listed in Table 1-1. If the instrument is operated outside
for the temperature range for a given set of specifica-
tions, the appropriate temperature coefficients, listed in
Table 1-1, must be added to those specifications. The
test limits given in the tables for the dc, ac and ohms ac-
curacy tests do not include temperature coefficients.
4-16. Each set of specifications includes an accuracy
specification for each voltage or ohms range. Accuracy
is specified as a percentage of reading plus an add-on of
one or more digits (counts). For example, the 24-hour
DC Accuracy specification for the 1-volt range (High
Resolution OfO is:
± (0.0031^0 of reading + 1 digits)
At full scale (1 V) the least significant display digit,
equal to 10 microvolt, is O.OOI^o of reading. The full-
scale accuracy is therefore:
4-1
Section IV
Model 34SSA
± (0.003% + 0.001%) = ± 0.004% of reading
Similarly, at one tenth of full scale (O.I V) the least signifi-
cant digit (10 microvolt) is equal to 0.01% of reading so the
accuracy specification is:
± (0.003% + 0.01%) * i 0.013% of reading
These specifications do not include the temperature coeffi-
cient that must be added if the instrument is operated out-
side of the 22°C to 24°C range.
4-17. DC ACCURACY TEST CONSIDERATIONS.
4-18. Because of the high dc accuracy of the 34SSA, a
precision dc calibration standard is required to verify that
it meets its dc accuracy specifications. To thoroughly test
the performance on all ranges, the standard must be capable
of delivering outputs within the range of 0.10000 V dc to
1000.000 V dc. The accuracy of the standard must be such
that its errors do not introduce significant uncertainties in
the 34S5A test readings. Ideally, the accuracy of the stand-
ard should be ten times better than the 34S5A specifica-
tions being tested — a ten to one error reduction nearly
eliminates measurement uncertainties caused by the stand-
ard. To test accuracy specifications on the order of
± O.00S% of reading, however, a standard with a specified
accuracy of t 0.0005% (S ppm) would be required. Since
this type of accuracy, over the range needed to completely
test the accuracy of the 34SSA, is generally not available
outside of a standards laboratory, some compromises may
be required. If you have access to primary in-house (NBS
certified) standards or have calibrated transfer standards
that are capable of delivering the required output voltages,
we recommend that you use them. If you do not have
access to such facilities you may. depending on your specif-
ic accuracy requirements, choose to do one of the follow-
ing:
a. Use a dc calibration standard that is four or five
times more accurate than the 34SSA specifications to
be tested. (A discussion of the potential uncertainties is
given in following paragraphs.)
b. Use a highly stable calibrated standard and add the
correction factors (given on the calibration chart) to the
34SSA test readings.
c. Send the 3455A to an -hp- Service Center or some
other NBS-certified standards facility for calibration.
4-19. Several of today’s commercially available dc calibra-
tion standards provide the output voltage range and resolu-
tion needed to test the performance of the 34S5A but they
are not, in general, an order of magnitude more accurate
than the 34SSA. When using such standards it is important
to be aware of the uncertainties or “ambiguities” that may
be encountered. These potential ambiguities are described
in the following paragraphs.
4-20. First, consider the case where a digital voltmeter
(DVM) is to be tested for a full-scale accuracy of ± 0.01%
of reading on its 1-volt range. Ute DVM is cormected to a
dc calibration standard u^ose specified accuracy is ±
0.001% of setting and with the standard set to -t- 1.00000 V,
the DVM reads +0.99992 V which is 0.008% low. The dc
standard's specified accuracy is ten times better than the
specification being tested and at 1 V its maximum error
contribution to the DVM reading is 10 microvolt or
0.001%. If the standard is 0.001% low the actual DVM
error is • 0.007%; if it is 0.001% high, the actual DVM error
is - 0.009%. In either case the DVM is within its specifica-
tion and, since this measurement is not a calibration but is
only intended to verify that the DVM meets its specifica-
tion, the standard’s error can be ignored.
4-21. But what if the DVM reading is + 0.999908 V? Here,
the DVM appears to be in tolerance (0.0092% low) but the
margin is only 0.0008% which is less than the 0.001% maxi-
mum allowable error contribution of the standard. If the
standard’s output is 0.001% low, the actual DVM error is
- 0.0082% rather than • 0.0092% so the DVM is within its
specification. If. on the other hand, the standard's output is
0.001% high, the actual DVM error is - 0.102% and the
DVM is slightly out of tolerance. Chances are good that the
DVM is within its specification but the only way to tell for
sure is to use a more accurate standard. As the example
points out, there are regions of ambiguity even when the
standard is ten times more accurate than the instrument
being tested. With a ten-to-one error reduction, however,
these regions are relatively narrow. In this case, the DVM
could be out of tolerance but if so, its maximum out-of-
tolerance error is only - 0.0002%. As long as the DVM
reading is within specified tolerances, the maximum DVM
error that can exist is ± 0.011% which is the sum of the
maximum DVM error and the maximum allowable error
of the standard. A potential deviation of ± 0.001% from the
DVM specifications could, in many cases, be acceptable.
Also, if the standard has been recently calibrated and is
known to be well within its specification, readings in the
narrow ambiguous regions may reflect marginal DVM per-
formance or indicate the need for adjustment.
4-22. Now suppose the dc standard's specified accuracy is
± 0.0025% — only four times better than the 1 0.01% DVM
accuracy specification. If the DVM reading is + 0.999890
volt, it appears that the DVM is 0.011% low. However, if
the dc standard is 0.002% low (well within its specification)
the DVM is only 0.009% low and is in tolerance. Con-
versely, if the DVM reading is + 1.00081 V the DVM
appears to be 0.0081% high and well within its specifica-
tion. But if the standard is 0.0023% low, the actual DVM
error is + 0.014% and the DVM is out of tolerance.
4-23. Figure 4-1 shows how the error tolerances of the
standard combine with those of the DVM to produce the
positive and negative ambiguous regions used in the pre-
ceding examples. From Figure 4-1, the following observa-
tions can be made:
a. If the DVM reading is in tolerance by a percentage
that is greater than the maximum allowable error of the
standard, the DVM is definitely within its specification.
4-2
Model 3455A
Section IV
b. If the DVM reading is out of tolerance by a per-
centage that is greater than the maximum allowable error of
the standard, the DVM is dermitcly outside of its specifica-
tion.
c. If the DVM reading is in or out of tolerance by a per-
centage that is less than the maximum allowable error of
the standard, it is in one of the ambiguous regions (shaded
areas) shown in Figure 4-1. The DVM may or may not be
within its specification and the only way to tell for sure is
to use a more accurate standard.
4-24. As the accuracy specifications of the standard
approach the specifications of the DVM to be tested, the
ambiguous regions sliown in Figure 4-1 become wider and
the uncertainty contributions of the standard become
increasingly significant. If the standard is less than three or
four times more accurate than the DVM. the performance
test is not practical because the ambiguous regions cover
most of the DVM’s error range. From a practical stand-
point, the dc standard should be at least five times more
accurate than the 34S5 A specifications to be tested. If such
a standard is nut available, an alternative approach is to
use a calibrated standard that is extremely stable and (pre-
ferably) two to four times more accurate than the 3455A.
When this is done, the correction factors given on the
dc standard’s calibration chart must be algebraically added
to the 34SSA test readings. Test validity depends on the
calibration uncertainties and the short-term stability of
the standard.
4-25. The Reference Divider recommended in the follow-
ing DC Voltmeter Accuracy Test is, according to its pub-
lished specifications, accurate enough to test all but the
1- volt and 10- volt full-scale 24-hour specifications. The 1-
volt and 10- volt full-scale specifications can be tested using
the DC Transfer Standard also recommended in the pro-
cedure.
4-26. OPERATIONAL VERIFICATION TESTS.
4-27. DC OPERATIONAL ACCURACY TEST.
4-28. The DC Transfer Standard required for the
following test must be calibrated to a 1.017 V to 1.019 V
standard cel) that has been calibrated by the National
Bureau of Standards (NBS). If the 345SA is to be tested
for its 24-hour accuracy specifications, the Transfer
Standard must be adjusted for optimum 1-volt and
10-volt output accuracy using NBS-calibrated stan-
dards. It is recommended that the Transfer Standard be
calibrated and adjusted just prior to use. After calibra-
tion, it should be left on and, if possible, kept in a con-
trolled environment where the ambient temperature is
within one or two degrees of the temperature in which it
was calibrated. The following procedure should be per-
formed in that same environment.
4-29. If the recommended DC Transfer Standard or its
equivalent is not available, an NBS-calibrated standard
cell (1.017 V to 1.019 V) can be substituted. If this is
done, check the full-scale accuracy of the 345SA 1 V and
10 V ranges using the Reference Divider recommended
in the procedure.
4-30. Tatt Procwlura.
Equipment Required:
Reference Divider (Fluke Model 7S0A)
DC Transfer Standard (Fluke Model 731A)
DC Standard (Systron Donner Model M106A)
DC Null Voltmeter (-hp- Model 419A)
a. Set the 34SSA controls as follows:
FUNCTION DCV
RANGE 1 V
HIGH RESOLUTION ON
AUTO CAL ON
GUARD ON
TRIGGER INTERNAL
b. Set the DC Transfer Standard for an output of 1
V. Connect the output of the transfer standard to the
3455A INPUT.
c. The 34S3A reading should be within the test limits
listed in Table 4-1 , verifying its 1-volt full-scale accuracy
with High Resolution on.
d. Set the 3455A RANGE to 10 V. The 3455A
reading should be within the test limits listed in Table
4-3, verifying its 10-volt tenth scale accuracy with High
Resolution on.
e. Set the Transfer Standard for an output of 10 V.
The 345SA reading should be within the test limits listed
in Table 4-1 verifying its 10-volt full scale accuracy with
High Resolution on.
Table 4-1. DC Accuracy Tast (1 V. 10 V Full Scala; High
Ratolutioa On).
Lflvei
Range
24 Houi
Te$( Llmiit
90 Day
Test Limits
1 V
10 V
1 V
10 V
0 999966 to 1 .000034
9.99977 to 10.00023
0.999936 to 1.000064
9.99947 to 10.00063
f. Set the 3455A HIGH RESOLUTION to OFF. The
34SSA reading should be within the test limits listed in
4-3
Section IV
Model 3455A
Figura 4-2. DC Accuracy Teat
Table 4-2, verifying its 10-volt full scale accuracy with to 1000 V and center its course and fine adjustment con-
High Resolution off. trols.
g. Set the Transfer Standard for an output of 1 V and
set the 3455A RANGE to 1 V. Set the 3455A GUARD
to OFF; connect the 3455A GUARD terminal to the
High INPUT terminal.
h. Reverse the 3455A INPUT connection to obtain a
negative 1 V reading. Repeat steps c through f to verify
the 1 V and 10 V full-scale accuracy for negative
readings.
i. Disconnect the Transfer Standard from the 34SSA
INPUT. Disconnect the GUARD terminal from the
High INPUT terminal and set the GUARD to ON.
j. Using short pieces of number 20 AWG (or thinner)
insulated solid copper wire, connect the Transfer Stan-
dard and DC Null Voltmeter to the Reference Divider as
shown in Figure 4-6.
k. Turn off the DC Standard’s output. Using 24" (or
shorter) shielded cables equipped with banana-plug con-
nectors, connect the DC Standard and the 34SSA to the
Reference Divider as shown in Figure 4-2.
Set the Reference Divider's Output Voltage switch to
1000 V.
o. Set the 34SSA controls as follows:
FUNCTION DCV
RANGE 1 kV
HIGH RESOLUTION ON
GUARD ON
^CAUTIONj
The dc standard’s output should be turned
on and the voltage adjusted by upranging or
downranging the standard whenever the
standard’s output needs to be changed. If a
345SA input voltage greater than 100 V is
needed, the following procedure should
always be followed.
p. Turn the dc standard’s output on and by the
following method adjust the standard for an output of
+ 1000.00 V:
l. Set the Standard Cell Voltage controls on the
Reference Divider to correspond to the calibrated
standard-cell setting on the Transfer Standard. Set the
Transfer Standard to output the calibrated standard-cell
voltage.
m. Zero the DC Null Voltmeter on its 3 microvolt
range and then set it to the 300 microvolt range.
n. Set the Reference Divider’s Input Voltage switch
1. Set the dc standard’s first decade to "0".
2. Uprange the dc standard to the I(XX) V range.
3. Increase the standard’s first decade so that 1000
V is reached by increasing the voltage in 100 V
increments.
q. Set the Reference Divider’s Standard Cell switch
to the Locked position. Adjust the dc standard’s output
4-4
Model 3455A
Section )V
voltage and vernier controls for a zero reading on the
null meter.
r. Downrange the Null Meter and adjust the
Reference Divider’s course and fine controls for a null is
obtained on the 3 microvolt range.
s. Set the Reference Divider's Standard Cell switch to
Open. Allow ten minutes for the Reference Divider to
warm-up and stablize.
t. Set the Reference Divider’s Standard Cell switch to
Momentary and, if necessary, readjust the fine control
for a null indication. Release the Standard Cell switch.
u. The 34S5A reading should be within the Test
Limits given in Table 4-3. (1000 V, 1 kV range), verify-
ing the full-scale accuracy at -f 1000 V with High
Resolution on.
NOTE
AUTO-CAL may have to be turned off
when making measurements on the 100 V
and 1000 V ranges. This is only necessary
when using a DC Standard sensitive to a
changing load impedance.
Table 4-2. DC Accuracy Tact {High Raaolution Off).
Level
3455A
Range
74 Hour
Teet Limits
90 Day
Test Limits
0-1 V
10 V 1
0.1 V
10 V .
.099992 to 1 00008
9.9997 to 10.0003
.099989 to .100011
9.9994 to 10.0006
NOTE
Each lime the Reference Divider Output
Voltage setting is changed, check for null
and, if necessary, readjust the Reference
Divider's fine control to obtain a null indica-
tion.
cautionJ
Always downrange the Reference Divider
before downranging the 34S5A. When
upranging, always uprange lhe34S5A before
upranging the Reference Divider.
Table 4-3. DC Accuracy Teat (High Resolution On).
Divider
Output
3455A
Rinoe
74 Hour
Test Limits
90 Day
Test Limits
1000 V
100 V
5 V
1 V
1000 V
100 V
10 V
10 V
999 957 to 1000.043
99.9957 to 100.0043
4.99987 to 5.00013
0.99995 to 1.00005
999.927 to 1000.073
99.9927 to 100.0073
4.99972 to 5.00028
0.99992 to 1.00008
'For positive readings onlV- Oo not apply negatiiA voltages greater
than • 500 V de.
v. Set the Reference Divider’s Output Voltage and
345SA RANGE to each setting (100 V and below) listed
in Tables 4-2 and 4-3 with High Resolution on or off as
indicated. At each setting, the 34SSA reading should be
within the Test Limits given in the table. (Be sure to
maintain null when the Reference Divider's output is
changed.)
ynrvmmrrrrv^
|CAUTION4
In the following tests for negative readings,
the input to the 3455A must not exceed -500
V dc, due to the ± 500 V guard to chassis
limitation.
w. Downrange the dc standard to 1 V output and
turn off the dc standard’s output. Reverse the polarity
of the 3455A INPUT connection to obtain negative
readings. Turn the dc standard’s output back on. Verify
the negative dc accuracy for all settings 100 V and
lower. Again, do not apply more than -500 V dc to the
3455A INPUT.
4-31. AC Operational Accuracy Tact
4-32. The 3455A ac voltmeter accuracy can be verified
for frequencies up to 100 kHz on all voltage ranges us-
ing an AC Calibrator such as the -hp- Model
74SA/746A. To minimize measurement uncertainties
for frequencies below SO Hz and above 20 kHz, the AC
Calibrator should be calibrated and its error measure-
ment control should be used to adjust out the errors in-
dicated on the calibration chart. For example, if the
calibration chart indicates that the 74SA output is
0.047t high at 1 V, 50 kHz, set the 74SA error measure-
ment control to -t- 0.047o to obtain a precise 1 V output.
The 745A/746A can be calibrated during a routine per-
formance test using the procedures outlined in the
74SA/746A Operating and Service Manuals. Calibra-
tion charts for these instruments are normally valid for
at least 30 days.
4-33. A Test Oscillator such as the -hp- Model 652A can
be used to verify the ac voltmeter accuracy of the 3455A
for frequencies above 100 kHz (specified for 1 V and 10
V ranges only). The required accuracy can be obtained
by adjusting the Test Oscillator output so that the
345SA reading at 10 kHz is the same as the reading ob-
tained with the highly accurate AC Calibrator. This
reference level can then be maintained to within ±
0.254'» over the 100 kHz to 1 MHz range using the
expanded-scale meter on the Test Oscillator. If higher
accuracy is desired, an ac-to-dc thermal transfer techni-
que (Figure 4-3) can be used.
4-34. Test Procaduru.
Equipment Required:
AC Calibrator (-hp- Model 745 A/746A)
Test Oscillator (-hp- Model 652A)
4-5
Section IV
Model 3455A
TEST OSCILLATOR
DIGITAL VOLTlieTER
PROCEDURE:
Apply accurate dc voltage II V or 3 V) from DC Starulard to
Thermal Converter and adjust DC Differential Voltmeter for
null. Disconnect the DC Standard and apply the Test Oscillator
output to both the Thermal Converter and the 34S5A. Adjust
the Test Oscillator output level for a null indication on the DC
Differential Voltmeter. This makes the rms value of the ac input
to the 3455A equal to the highly accurate output of the DC
StarKfard. Repeat this procedure each time the Test Oscillator
frequency is changed.
Figure 4-3. AC/DC Thermal Transfer Measurement (Altarnete Frequency Response Test).
a. Set the 3455A controls as follows:
FUNCTION ACV
RANGE 1 V
GUARD ON
INPUT SELECT FRONT
b. Set the AC Calibrator for an output of 1 V, 30 Hz
(745A 1 V range). Set the AC Calibrator’s error
measurement control to offset the 1 V, 30 Hz error in-
dicated on the calibration chart (745A 0. 1 error range).
c. Connect the output of the AC Calibrator to the
3455A front panel INPUT.
d. 1 . Standard Model 34S5A: The 3455A 1 V. 30 Hz
reading should be within the Test Limits listed
in Table 4-4.
2. 3455A Option 001: The 3455A 1 V, 30 Hz
(ACV) reading should be within the Test Limits
listed in Table 4-6.
e. 1. Standard Model 34SSA: Using the AC
Calibrator, verify the 34SSA ac voltmeter ac-
curacy for each Test Frequency, Input Level
and 3455A Range listed in Table 4-4. The
3455A display readings should be within the
Test Limits given in the table.
2. 34SSA Option 001: Using the AC Calibrator,
verify the 345SA ac voltmeter accuracy for each
Test Frequency (ACV), Input Level and 3455A
Range listed in Table 4-6. The 34SSA display
readings should be within the Test Limits given
in the table.
f. Set the 3455A FUNCTION to FAST ACV.
g. 1. Standard Mode) 34SSA: Using the AC
Calibrator, verify the 3455A ac voltmeter ac-
curacy (Fast ACV) for each Test Frequency
above 10 kHz, each Input Level and 345SA
Range listed in Table 4-4. The 3455A display
readings should be within the Test Limits given
in the table.
2. 34S5A Option 001: Using the AC Calibrator,
4-6
Model 3455A
Section IV
Table 4-4. AC Accuracy Tast 30 Hz to 100 kHz (Standard Model 3455A only).
Test
Frequency
Input
Level
34S6A
Range
24 Hour**
Test Limits
90 Day**
Test Limits
30 Hz*
1 V
1 V
0.99920 to 1.00080
0.99900 to 1.00100
100 kHz
1 V
1 V
0.99S20 to 1.00480
0.99400 to 1.00600
30 Hz*
5V
10 V
4 9940 to 5.0060
4.9925 to 5.0076
100 kHz
5V
10 V
4.9720 to S.0280
4.9650 to 5.0350
30 Hz*
10 V
10 V
9.9920 to 10.0080
9.9900 to 10.0100
20 kHz
10 V
10 V
9.9920 to 10.0080
9.9900 to 10.0100
100 kHz
10 V
10 V
9.9520 to 10.0480
9.9400 to 10.0600
30 Hz*
100 V
100 V
99.920 to 100.080
99.900 to 100.100
100 kHz
100 V
100 V
99.520 to 100.480
99.400 to 100.600
30 Hz*
1000 V
1000 V
998.00 to 1002.00
997.50 to 1002.50
10 kHz
1000 V
1000 V
998.00 to 1002.00
997.50to 1002.60
* Fraquenciet below 300 Hz apply to ACV Function only.
* 'These test limits do not Include the temperature coefdcients that must be edded if
the Instrument is operated outside of the temperature ranpe over which the 24-
hour or 90-dav specifications apply (see Table 1-1). Derive 6-month test limits
from AC Accuracy specifications listed in Table 1-1.
verify the 3455A ac voltmeter accuracy for each
Test Frequency {Fast ACV), Input Level and
3455A Range listed in Table 4-6. The 3455A
display readings should be within the Test
Limits given in the table.
h. Set the AC Calibrator for an output of 1 V, 10
kHz. Set the 3455A FUNCTION to ACV and RANGE
to 1 V.
i. Record the 3455A reading:. . V.
j. Set the 3455A FUNCTION to FAST ACV. Record
the 3435A reading: . . V.
k. Set the 3455A FUNCTION to ACV and RANGE
to 10 V. Set the AC Calibrator for an output of 5 V, 10
kHz.
l. Record the 34S5A reading:. . V.
m. Set the 3455A FUNCTION to FAST ACV.
Record the 3455A reading: . . V.
n. Disconnect the AC Calibrator from the 34SSA. Set
the 3455A FUNCTION to ACV and RANGE to 1 V.
0 . Set the Test Oscillator for an output of 1 V, 10
kHz. Connect the SO-ohm output of the Test Oscillator,
terminated in a 50 ohm load, to the 34SSA front panel
INPUT.
p. Adjust the Test Oscillator level controls for a
3455A reading as close as possible to the reading record-
ed in Step i. Set the Test Oscillator’s meter switch to ex-
panded scale and adjust the meter reference controls for
a zero reading on the Test Oscillator’s meter. Use the
Test Oscillator’s level controls to maintain this zero
reading whenever the Test Oscillator frequency is
varied.
q. 1. Standard Model 3455 A: Set the Test Oscillator
to 1 MHz (maintain reference level on meter of
Test Oscillator). The 3455A display reading
should be within the Test Limits given in Table
4-5.
2. 3455A Option 001: Set the Test Oscillator fre-
quency to 250 kHz (maintain reference level on
meter of Test Oscillator). The 3455A display
reading should be between 0.99240 V and
1.00760 V (24-hour spec.) or between 0.99190 V
and 1.00810 V (90-day spec.).
r. Set the 3455A FUNCTION to FAST ACV. Set the
Test Oscillator frequency to 10 kHz and adjust its out-
put level for the 3455A reading recorded in step j. Ad-
just the meter reference controls for a zero reading on
Table 4-5. AC Accuracy Teete 100 kHz to 1 MHz IStandard Model 345SA only).
Test
Frequency
Input
Level
3455A
Range
24 Hour*
Test Limits
90 Day*
Test Limits
1 MHz
1 V
1 V
0.92400 to 1.07600
0.90900 to 1.09100
1 MHz
5V
10 V
4.4900 to 5.5100
4J900 to 5.6100
350 kHz
5V
10 V
4.7600 to 5.2400
4.70IX) to 5.3000
*Thes« lest limits do not include the temperature coefficients that must be added if
the instrument is operated outside of the temperature range over which the 24-hour
or 90-day specifications apply (see Table 1-11. Derive 6-month test limits from AC
Accuracy specifications listed in Table 1-1 .
4-7
Section IV
Model 3455A
Table 4-6. AC Accuracy Test 30 Hz te 100 kHz (34SSA Option 001 onlyl.
Frequency
(ACV)
Frequency
(FAST ACV)
Input
Level
345SA
Range
24 Hour'
Test Limits
90 Day'
Tast Limits
30
300 Hz
1 V
1 V
0 99460 to 1.00540
0.99430 to 1 00570
60 Hz
500 Hz
1 V
1 V
0.99630 to 1.00370
0 99600 to 1.00400
250 kHz
250 kHz
1 V
1 V
0 99240 to 1.00760
0.99190 to 1.00810
30 Hz
300 Hz
5V
10 V
4.969510 5.0305
4.9680 to 5.0320
100 kHz
100 kHz
5V
10 V
4.9930 to 5 0070
4 9925 to 5.0075
250 kHz
250 kHz
5V
10 V
4 9590 to 5.0410
4.9565 to 5.0436
30 Hz
300 Hz
10 V
10 V
9 9460 to 10.0540
9.9430 to 10.0570
100 Hz
1 kHz
10 V
10 V
9 9886 to 10.0115
9.9875 to 10.0125
100 kHz
100 kHz
10 V
10 V
99885 to 10.0115
9.987S to 10.0125
30 Hz
300 Hz
100 V
100 V
99 460 to 100.540
99.430 to 100.570
100 kHz
100 kHz
100 V
100 V
99 885 to 100.115
99.87510 100.126
30 Hz
300 Hz
1000 V
lOOOV
994.60 to 1005.40
994.30 to 1005.70
10 kHz
10 kHz
1000 V
1000 V
998.75 to 1001.25
998 65 to 1001 .35
'These (est limits do not include the lemperaiuri coefficients that must be added if the instru-
ment is operated outside of the temperature range over which the 24 hour or 90-day specifi-
cations apply (see Table 1-11. Derive 6-month test limits from AC Accuracy specifications
listed in Table T1
the meter of the Test Oscillator and use control to main-
tain this reading whenever the frequency is varied.
s. Repeat step q.
t. Set the 3455A FUNCTION to ACV and RANGE
to 10 V. Remove the 50-ohm termination from the Test
Oscillator’s output. Connect the 50-ohm output of the
Test Oscillator (unterminated) to the 3455A front panel
INPUT. Set the Test Oscillator frequency to 10 kHz and
adjust its level controls for the 5 volt 3455A reading
recorded in step 1. Adjust the meter reference controls
for a zero reading on the meter of the Test Oscillator
and use the level controls to maintain this reading
whenever the frequency is varied.
u. I. Standard Model 3455A: Set the Test Oscillator
to each of the last two Test Frequencies listed in
Table 4-5 (maintain reference level on meter of
Test Oscillator). At each frequency setting, (he
3455A reading should be within the Test Limits
given in the table.
2. 345SA Option 001. Set the Test Oscillator fre-
quency to 250 kHz (maintain reference level on
meter of Test Oscillator). The 3455A display
reading should be between 4.9590 V and 5.0410
V (24-hour spec.) or between 4.9565 V and
5.0435 V (90-day spec.).
v. Set the 3455A FUNCTION to FAST ACV. Set the
Test Oscillator frequency to 10 kHz and adjust its level
controls for the 5 V 3455A reading recorded in step m.
Adjust the meter reference controls for a zero reading
on the meter of the Test Oscillator and use the level con-
trols to maintain this reading whenever the frequency is
varied.
w. Repeat step u.
Table 4-7. Two-Wira Ohm Accuracy TasL
Test Limets
(High Ree. Onl
Decade
Resaloi
34S5A
Range
24 Hour*
90 Day '
100
99.9971 to 100.0029
99 9995 to 100.0045
•These test limits do not include the temperature coefficients
that must be added if the instrument it operated outside of the
temperature rar>ge over v^ich the 24-hour or 90-day speciflca-
tiorts apply (see Table 1-1). Derive 6-month test limits from
Ohms Accuracy specifications listed In Table 1-1 .
X. This completes the AC Voltmeter Accuracy Test.
Disconnect the Test Oscillator from the 3455A.
4-35. Ohmmatar Accuracy Tast
4-36. This test requires a ca/ibraret/ decade resistor with
settings that range from 100 ohms to 10 megohms. The
correction factors indicated on the decade resistor’s
calibration chart must be algebraically added to the
345SA display readings to achieve the required test ac-
curacy.
4-37. Tast Pracadura.
Equipment Required;
Decade Resistor (calibrated General Radio
Model I433Z)
a. Set the 3455A controls as follows:
FUNCTION 2 WIRE K OHM
RANGE 100
HIGH RESOLUTION ON
GUARD ON
4-8
Model 3455A
Seclion JV
Table 4-B. Foar-Wira Ohm Accuracy Teat
Decade
Resistor
34S5A
Range
icon
0.1
1 kQ
1
10 kO
10
100 kU
100
1 MO
1 K
10 MO
10 K
I A)
Test Limits
(High R«s. Off)
(Bl
Test Limits
(High Res. On)
34 Hour*
90 Day’
34 Hour*
90 Day*
0.099993 to 0.100007
0.099990 to 0.100010
0.999971 to 1.000039
9.99951 TO 10.00049
99.9975 to 100.0035
999.876 to 1000.124
9989.96 to 10010.04
0.999960 to 1.000040
9.99935 to 10.00065
99.9959 to 100.0041
999.860 to 1000.140
9989 95 to 10010.05
’These test limits do not include the temperature coefficients that mutt be added if the instrument is operated outside of
the temperature range over mhich the 24-hour or 90-day specifications apply (tee Table 1-1). Derive 6-month test limits
fromOhms Accuracy specifications listed in Table 1-1 .
b. Using a shielded cable equipped with banana-plug
connectors, connect the Decade Resistor to the INPUT
of the 345SA. Set the Decade Resistor to 100 K ohms.
c. Algebraically add the Decade Resistor's correction
factor to the 3455A reading. The algebraic sum should
be within the test Limits given in Table 4-7, verifying the
34S5A 2-wire ohms accuracy.
d. Set the 34S5A controls as follows:
FUNCTION 4 WIRE K OHM
RANGE 0.1
HIGH RESOLUTION OFF
e. Set the Decade Resistor to 100 ohms. Connect a
shielded cable, equipped with banana-plug connectors,
between the 34SSA OHM SIGNAL output and the input
of the Decade Resistor. {Leave the other cable con-
nected between the 345SA INPUT and the input of the
Decade Resistor).
f. Algebraically add the Decade Resistor’s correction
factor to the 345SA reading. The algebraic sum should
be within the Test Limits given in Table 4-8 (A), verify-
ing the 3455A 4-wire ohms accuracy with High Resolu-
tion off.
g. Set the 34SSA RANGE to 1 and HIGH RESOLU-
TION to ON. Set the Decade Resistor to 1,000 ohms.
h. Algebraically add the Decade Resistor’s correction
factor to the 3455A reading. The algebraic sum should
be within the Test Limits given in Table 4-8(B), verify-
ing the 345SA 4-wire ohms accuracy with High Resolu-
tion on.
i. Repeat Step h for each additional Decade Resistor
setting and 34SSA Range listed in Table 4-8 (B).
4-38. DC VOLTMETER INPUT RESISTANCE TEST.
DC Standard Systron Donner Model MI06A
Resistor (1 MO ± 0.01<!’'o 1/4 W -hp- part
number 0811-0202)
a. Connect the low output of the DC Standard to the
Low Input terminal of the 34SSA. Using short clip leads
insert the 1 megohm resistor in series between the DC
Standard's high output and the High INPUT terminal
of the 34SSA. Connect a clip lead across the resistor.
b. Set the 3455A controls as follows:
FUNCTION DCV
RANGE 10 V
HIGH RESOLUTION ON
GUARD ON
c. Adjust the DC Standard for a 34SSA reading of
+ 10.00000 V.
d. Remove the clip lead from across the I megohm
resistor.
e. The 3455A reading should be between 9.9S>900 V
and 10.00000 V, verifying that the input resistance is
greater than 10*^ ohms.
f. Set the 3455A RANGE to 100 V; AUTO-CAL off.
Reconnect the clip lead across the 1 megohm resistor.
g. Adjust the DC Standard for a 34SSA reading of
+ 10.00000 V.
h. Remove the clip lead from across the 1 megohm
resistor.
i. The 3455A reading should be between + 9.0900 V
and + 9.0917 V, verifying that the input resistance is 10
megohms ± O.l^o.
4 39 PERFORMANCE TEST.
Equipment Required:
4-40. DC VOLTMETER ACCURACY TEST.
4-9
Section IV
Model .1455A
4-41. The DC Transfer Standard required for the
following test must be calibrated to a 1. 017 V to 1.019 V
standard cell that has been calibrated by the National
Bureau of Standards (NBS). If the 3435A is to be tested
for its 24-hour accuracy specifications, the Transfer
Standard must be adjusted for optimum 1-volt and
10-volt output accuracy using NBS-calibrated stan-
dards. It is recommended that the Transfer Standard be
calibrated and adjusted just prior to use. After calibra-
tion, it should be left on and. if possible, kept in a con-
trolled environment where the ambient temperature is
within one or two degrees of the temperature in which it
was calibrated. The following procedure should be per-
formed in that same environment.
4-42. If the recommended DC Transfer Standard or its
equivalent is not available, an NBS-calibrated standard
cell (1.017 V to 1.019 V) can be substituted. If this is
done, check the full-scale accuracy of the 34S5A 1 V and
10 V ranges using the Reference Divider recommended
in the procedue.
443. Test Proeadurt.
Equipment Required:
Reference Divider (Fluke Model 7S0A)
DC Transfer Standard (Fluke Model 731A)
DC Standard (Systron Donner Model M106A)
DC Null Voltmeter (-hp- Model 419A)
a. Set the 34S5A controls as follows:
FUNCTION DCV
RANGE 1 V
HIGH RESOLUTION OFF
AUTO CAL ON
GUARD ON
TRIGGER INTERNAL
b. Set the DC Transfer Standard for an output of I
V. Connect the output of the transfer standard to the
3455A INPUT.
c. The 3455A reading should be within the test limits
listed in Table 4-9, verifying its 1-volt full-scale accuracy
with High Resolution off.
Tabla 4-8. DC Accaracy Test (1 V, 10 V Fall-Seala; High
Ratolutian Off).
Input
34SSA
24 Hour
90 Oey
Level
Renge
Test Limits
Limits
1 V
1 V
0.99996 to 1.00004
0.99993 to 1.00007
10 V
10 V
9.9997 to 10.0003
9.9994 to 10.0006
d. Set the 3455A HIGH RESOLUTION to ON. The
345SA reading should be within the test limits listed in
Table 4-10, verifying its 1-volt full scale accuracy with
High Resolution on.
e. Set the 3455A RANGE to 10 V. Set the Transfer
Standard for an output of 10 V. The 345SA reading
should be within the test limits listed in Table 4-10, veri-
fying its 10-volt full scale accuracy with High Resolu-
tion on.
Table 410. DC Aearaey Teat (1 V. 10 V Full Stale; High
Retalulian On).
.evel
Renge
24 Hour
Test Limits
90 Dsy
Test Limits
1 V
10 V
1 V
lOV
0.999966 to 1.000034
9.99977 to 10.00023
0.999936 to 1.000064
9.99947 to 10.00063
f. Set the 3455A HIGH RESOLUTION to OFF. The
34SSA reading should be within test limits listed in
Table 4-9, verifying its 10-volt full scale accuracy with
High Resolution off.
g. Set the Transfer Standard for an output of 1 V and
set the 3455A RANGE to 1 V. Set the 3455A GUARD
to OFF; connect the 34SSA GUARD terminal to the
High INPUT terminal.
h. Reverse the 34SSA INPUT connection to obtain a
negative 1 V reading. Repeat Steps c through f to verify
the I V and 10 V full-scale accuracy for negative
readings.
i. Disconnect the Transfer Standard from the 345SA
INPUT. Disconnect the GUARD terminal from the
High INPUT terminal and set the GUARD to ON.
j. Using short pieces of number 20 AWG (or thinner)
insulated solid copper wire, connect the Transfer Stan-
dard and DC Null Voltmeter to the Reference Divider as
shown in Figure 44.
k. Turn off the DC Standard’s output. Using 24” (or
shorter) shielded cables equipped with banana-plug con-
nectors, connect the DC Standard and the 34S5A to the
Reference Divider as shown in Figure 44.
l. Set the Standard Cell Voltage controls on the
Reference Divider to correspond to the calibrated
standard-cell setting on the Transfer Standard. Set the
Transfer Standard to output the calibrated standard-cell
voltage.
m. Zero the DC Null Voltmeter on its 3 microvolt
range and then set it to the 300 microvolt range.
n. Set the Reference Divider’s Input Voltage switch
to 10(X) V and center its course and fine adjustment con-
trols. Set the Reference Divider’s Output Voltage switch
to 1000 V.
o. Set the 34SSA controls as follows:
4-10
Model 3455A
Section IV
FUNCTION DCV
RANGE I kV
HIGH RESOLUTION OFF
GUARD ON
CAUTION
The dc standard's output should be turned
on and the voltage adjusted by upranging or
downranging the standard whenever the
standard’s output needs to be changed. If a
3455A input voltage greater than 100 V is
needed, the following procedure should
always be followed.
p. Turn the dc standard’s output on and by the fol
lowing method adjust the standard for an output of
+ 1000.00 V:
1. Set the dc standard’s first decade to “0”.
2. Uprange the dc standard to the 1000 V range.
3. Increase the standard's first decade so that 1000
V is reached by increasing the voltage in 100 V
increments.
q. Set the Reference Divider's Standard Cell switch
to the Locked position. Adjust the DC Standard's out-
put voltage and vernier controls for a zero reading on
the null meter.
r. Downrange the Null Meter and adjust the
Reference Divider’s coarse and fine controls for a null
indication. Repeat until a null is obtained on the 3
microvolt range.
s. Set the Reference Divider's Standard Cell switch to
Open. Allow ten minutes for the Reference Divider to
warmup and stabilize.
Table 4-M. DC Accuracy Tnt (High Resolution Off).
Divider
Output
3455A
Range
24 Hour
Test Limits
90 Day
Test Limits
1000 V'
1000 V
999.95 to 1000.05
999.92 to 1000.08
500 V
1000 V
499.97 to 500.03
499.96 to 500.04
100 V
100 V
99.995 to 100.005
99.992 to 100.008
0.1 V
0.1 V
.099992 to 1.00008
.099989 to .100011
'For positive raadirt 0 s only. Do not apply negative voltages
greater than -500 V dc.
Table 4-12. DC Accuracy Test (High Resolution On).
II
Q O
3455A
R»ng>
?4 Houf
T«R Limit*
90 0«v
Tffft Limiti
1000 V
1000 V
S99.9S7 to 1000.043
999.927 to 1000.073
SOO V
1000 V
499.977 10 600.023
499962 to 500.038
lOOV
1000 V
99.99310 100.007
99.990 to 100.010
100 V
100 V
99.9957(0 100.0043
99.992710 100.0073
50 V
100 V
499977 to 50.0023
49.9962 to 50.0036
10 V
100 V
99993(0 10.0007
9.9990 10 10.0010
5V
lOV
4.99987(0 5.00013
4 99972 10 5.00026
1 V
10 V
0.99995 10 1 .00005
0.99992(0 1.00008
05 V
1 V
0.499981 to 0.500019
0.499966 to 0.500034
0 1 V
} V
0 099993lo0 100007
0.099990 to 0.100010
'For positive readings only. Oo not apply negative voltages
greater than - 500 V dc.
t. Set the Reference Divider’s Standard Cell switch to
Momentary and, if necessary, readjust the fine control
for a null indication. Release the Standard Cell switch.
NOTE
AUTO-CAL may have to be turned off
4-11
Section IV
Model 3455A
when making measurements on the 100 V
and 1000 V ranges. This is only necessary
when using a DC Standard sensitive to a
changing load impedance.
u. The 345SA reading should be within the Test
Limits given in Table 4-1! (1000 V, 1 kV range), verify-
ing the full-scale accuracy at + 1000 V with High
Resolution off.
V. With the 3455A on the 1 kV range, set the HIGH
RESOLUTION to ON.
w. The 34SSA reading should be within the Test
Limits given in Table 4-12 (1000 V, 1 kV range), verify-
ing the full scale accuracy at + 1000 V with High
Resolution on.
NOTE
Each time the Reference Divider Output
Voltage setting is changed, check for null
and, if necessary, readjust the Reference
Divider's fine control to obtain a null indica-
tion.
Always downrange the Reference Divider
before downranging the 3455 A. When
upranging, always uprange the 3455 A before
upranging the Reference Divider.
X. Set the DC Standard for an output of + 500 V.
y. Set the Reference Dividers Input Voltage switch to
SOO V and center the course and fine adjustment con-
trols. Set the Reference Dividers Output Voltage switch
to 500 V.
z. Adjust the DC Standard and Reference divider as
outlined in Steps q through t.
aa. Set the Reference Divider's Output Voltage and
3455A RANGE to each setting (500 V and below) listed
in Table 4-12. At each setting, the 34S5A reading should
be within the Test Limits given in the table. (Be sure to
maintain null when the Reference Divider's output is
changed.)
bb. Set the 3455A RANGE to 1 kV and set HIGH
RESOLUTION to OFF.
cc. Set the Reference Divider’s Output Voltage and
3455A RANGE to each setting (500 V and below) listed
in Table 4-1 1 . At each setting, the 3455 A reading should
be within the Test Limits given in the table. (Be sure to
maintain null when the Reference Dividers output is
changed.)
fcMmONl
In the following tests for negative readings,
the input to the 3455 A must not exceed -500
V dc due to the ± 500 V guard to chassis
limitation.
dd. Downrange the dc standard to 1 V output and
turn off the dc standard's output. Reverse the polarity
of the 3455A INPUT connection to obtain negative
readings.
ee. Set the 3455A RANGE to 1 kV and HIGH
RESOLUTION to ON. Set the Reference Divider Out-
put Voltage switch to 500 V, turn the dc standard’s out-
put back on, and uprange to SOO V.
ff. Repeat Steps aa through cc to verify the negative
dc accuracy for all settings 500 V and lower. Again, do
not apply more than -500 V dc to the 3455A INPUT.
4-44. AC Voltmitar Accuracy TasL
4-45. The 34S5A ac voltmeter accuracy can be verified
for frequencies up to 100 kHz on all voltage ranges us-
ing an AC Calibrator such as the -hp- Model
745A/746A. To minimize measurement uncertainties
for frequencies below SO Hz and above 20 kHz, the AC
Calibrator should be calibrated and its error measure-
ment control should be used to adjust out the errors in-
dicated on the calibration chart. For example, if the
calibration chart indicates that the 745A output is
0.04Vo high at 1 V, 50 kHz, set the 745A error measure-
ment control to + 0.04i% to obtain a precise 1 V output.
The 745A/746A can be calibrated during a routine per-
formance test using the procedures outlined in the
745A/746A Operating and Service Manuals. Calibra-
tion charts for these instruments are normally valid for
at least 30 days.
4-46. A Test Oscillator such as the -hp- Model 652A can
be used to verify the ac voltmeter accuracy of the 3455A
for frequencies above 100 kHz (specified for 1 V and 10
V ranges only). The required accuracy can be obtained
by adjusting the Test Oscillator output so that the
3455A reading at 10 kHz is the same as the reading ob-
tained with the highly accurate AC Calibrator. This
reference level can then be maintained to within ±
0.25<7t over the 100 kHz to 1 MHz range using the
expanded-scale meter on the Test Oscillator. If higher
accuracy is desired, an ac-to-dc thermal transfer techni-
que (Figure 4-5) can be used.
4-47. Test Procedure.
Equipment Required:
AC Calibrator (-hp- Model 745A/746A)
Test Oscillator (-hp- Model 652A)
4-12
Section IV
Model 34S5A
TEST OSCILLATOR DIGITAL VOLTMETER
PROCEDURE:
Appiv accurate dc voltage II V or 3 V) from OC Standard to
Thermal Converter and adjust DC Differential Voltmeter for
null. Disconnect the DC Standard and apply the Test Oscillator
output to both the Thermal Converter and the 3455A. Ad)ust
the Test Oscillator output level for a null indication on the OC
Differential Volirrteter. This makes the rms value of the ac input
to the 3455A equal to the highly accurate output of the DC
Standard. Repeat this procedure each time the Test Oscillator
frequency is changed.
Fioura 4-5. AC/OC Thaniial Trtmftr MuturtMitt (Altarnat* Frgqueficy ResponM Tmi).
a. Set the 34SSA controls as follows;
FUNCTION ACV
RANGE I V
GUARD ON
INPUT SELECT FRONT
b. Set the AC Calibrator for an output of 1 V, 30 Hz
(74SA 1 V range). Set the AC Calibrator’s error
measurement control to offset the 1 V, 30 Hz error in-
dicated on the calibration chart (745A 0.1 error range).
c. Connect the output of the AC Calibrator to the
3455A front panel INPUT.
d. 1. Standard Model 3455A: The3455A 1 V,30Hz
reading should be within the Test Limits listed
in Table 4-13.
2. 3455A Option 001: The 3455A 1 V. 30 Hz
(ACV) reading should be within the Test Limits
listed in Table 4-IS.
e. 1. Standard Model 34SSA: Using the AC
Calibrator, verify the 34SSA ac voltmeter ac-
curacy for each Test Frequency, Input Level
and 3455A Range listed in Table ^13. The
345SA display readings should be within the
Test Limits given in the table.
2. 3455A Option 001: Using the AC Calibrator,
verify the 345SA ac voltmeter accuracy for each
Test Frequency (ACV), Input Level and 3455A
Range listed in Table 4-15. The 345SA display
readings should be within the Test Limits given
in the table.
f. Set the 3455A FUNCTION to FAST ACV.
g. 1. Standard Model 3455A: Using the AC
Calibrator, verify the 3455A ac voltmeter ac-
curacy (Fast ACV) for each Test Frequency
above 100 Hz, each Input Level and 34S5A
Range listed in Table 4-13. The 345SA display
readings should be within the Test Limits given
4-13
Section IV
Model 3455A
ratals 4-13. AC Accuracy Taat 30 Hi to 100 kHi (Standard Modal 34SSA only).
Test
Frequency
Input
Level
345SA
Range
24 Hour**
Test Limits
90 Day**
Test Limits
30 Hz*
1 V
1 V
0.99920 to 1.00080
0 99900 to 1.00100
300 Hz
1 V
t V
to kHz
1 V
1 V
20 kHz
1 V
1 V
50 kHz
1 V
1 V
0.99520 to 1.00480
0.99400 to 1.00600
too kHz
1 V
1 V
30 Hz*
5V
10 V
4.9940 to
5.0060
4.9925 to
5.0075
300 Hz
5V
10 V
20 kHz
5V
10 V
too kHz
5V
10 V
4.9720 to
5.0280
4.9650 to
5.0350
30 Hz*
10 V
10 V
9^920 to
10.0080
9.9900 to
10.0100
60 Hz*
10 V
10 V
too Hz*
10 V
10 V
500 Hz
10 V
10 V
t kHz
10 V
lOV
5 kHz
to V
10 V
to kHz
10 V
10V
20 kHz
tov
10V
50 kHz
10 V
10 V
9.9520 to 10.0480
9.9400 to
10.0600
too kHz
10 V
10 V
30 Hz*
toov
100 V
99.920 to 100.080
99.900 to
100.100
300 Hz
100 V
100 V
to kHz
100V
100 V
20 kHz
too V
100 V
too kHz
100 V
100 V
99.52010 100.480
99.400 to 100.600
30 Hz*
1000 V
1000 V
998.00 to 1002.00
997.50 to
1002.50
300 Hz
1000 V
1000 V
10 kHz
1000 V
1000 V
* Frequencies below 300 Hz apply to ACV Function only.
**Tbese test limits do not include the temperature coefficients that must be added
if the instrurrtent is operated outside of the temperature range over vvhich the
24-hour or 90-day specifications apply (see Table 1-1). Derive 6-month test
limits from AC Accuracy specifications listed in Table 1 -1 .
in the table.
2 . 3455A Option 001: Using the AC Calibrator,
verify the 3455A ac voltmeter accuracy for each
Test Frequency (Fast ACV), Input Level and
3455A Range listed in Table 4-15- The 3455A
display readings should be within the Test
Limits given in the table.
h. Set the AC Calibrator for an output of 1 V, 10
khz. Set the 3455A FUNCTION to ACV and RANGE
to 1 V.
0 . Set the Test Oscillator for an output of 1 V, 10
kHz. Connect the 50-ohm output of the Test Oscillator,
terminated in a 50-ohm load, to the 3455A front panel
INPUT.
p. Adjust the Test Oscillator level controls for a 34S5A
reading as close as possible to the reading recorded in
Step i. Set the Test Oscillator’s meter switch to expand-
ed scale and adjust the meter reference controls for a
zero reading on the Test Oscillator’s meter. Use the Test
Oscillator’s level controls to maintain this zero reading
whenever the Test Oscillator frequency is varied.
i. Record the 3455A reading; V.
j. Set the 3455A FUNCTION to FAST ACV. Record
the 3455A reading: V.
k. Set the 3455A FUNCTION to ACV and RANGE
to 10 V. Set the AC Calibrator for an output of 6 V, 10
kHz.
1 .Record the 3455A reading: V.
m. Set the 3455A FUNCTION to FAST ACV.
Record the 3455A reading: V.
n. Disconnect the AC Calibrator from the 3455A. Set
the 3455A FUNCTION to ACV and RANGE to 1 V.
q. 1. Standard Model 3455A: Set the Test Oscillator
to each of the first four Test Frequencies listed
in Table 4-14 (maintain reference level on meter
of Test Oscillator). At each frequency setting,
the 34S5A display reading should be within the
Test Limits given in the table.
2 . 3455A Option 001; Set the Test Oscillator fre-
quency to 250 kHz (maintain reference level on
meter of Test Oscillator). The 3455A display
reading should be between 0.99240 V and
1.00760V (24-hour spec.) or between 0.99190 V
and 1.00810 V (90-day spec.).
r. Set the 3455A FUNCTION to FAST ACV. Set the
Test Oscillator frequency to 10 kHz and adjust its out-
4-14
Section [V
MoJel .1455A
Table 4-14. AC Accuracy Tact 100 hHc ta 1 MHi IStaadard Modal 34SSA aniy).
Test
Frequency
Input
Level
34S5A
Range
24 Hour*
Test Limits
90 Day’
Test Limits
110 kHz
1 V
1 V
0.98000 to 1.02000
0.97750 to 1.02250
250 kHz
1 V
1 V
1
1
500 kHz
1 V
1 V
0.95600 to 1.04400
0.94500 to 1 .05500
1 MHz
1 V
1 V
0.92400 to 1.07600
0.92000 to 1.08000
no kHz
6V
10 V
5.8720 to 6.1280
5.8550 to 6.1450
250 kHz
6V
10 V
1
1
500 kHz
6 V
10 V
5.7200 to 6.2800
5.6500 to 6.3600
1 MHz
6V
10 V
5.5500 to 6.4500
5.4400 to 6.5600
’These test limits do not include the temperature coefficients that must be
added if the instrument is operated outside of the temperature range over
which the 24-hour or 90-dav specifications apply Isee Table 1-1). Derive
6-month test limits from AC Accuracy specifications listed in Table
1 - 1 .
put level for the 34S5A reading recorded in Step j. Ad-
just meter reference controls for a zero reading on the
meter of the Test Oscillator and use the level control to
maintain this reading whenever the frequency is varied.
s. Repeat Step q.
t. Set the 3455A FUNCTION to ACV and RANGE
to 10 V. Remove the SO-ohm termination from the Test
Oscillator’s output. Connect the SO-ohm output of the
Test Oscillator (unterminated) to the 34S3A front panel
INPUT. Set the Test Oscillator frequency to 10 kHz and
adjust its level controls for the 6 V 34SSA reading
recorded in Step 1. Adjust the meter reference controls
for a zero reading on the meter of the Test Oscillator
and use the level controls to maintain this reading
whenever the frequency is varied.
u. 1 . Standard Model 34SSA: Set the Test Oscillator
to each of the second four Test Frequencies
listed in Table 4-6 (maintain reference level on
meter of Test Oscillator). At each - frequency
setting, the 34SSA reading should be within the
Test Limits given in the table.
Table 4-1S. AC Aecuracy Test 30 Hz to 100 hHz (34SSA Option 001 only).
Frequency
(ACV)
Freq uency
(FAST ACVl
Input
Level
3455A
Range
24 Hour’
Test Limits
90 Day*
Test Limits
30 Hz
300 Hz
1 V
1 V
0.99460 to 1.00540
0.99430 to 1.00570
50 Hz
500 Hz
1 V
1 V
0.99630 to 1.00370
0.99600 to 1.00400
100 Hz
1 kHz
1 V
1 V
0.99885 tol.00115
0.99875
0 1.00125
10 kHz
10 kHz
1 V
1 V
SO kHz
50 kHz
1 V
1 V
100 kHz
100 kHz
1 V
1 V
30 Hz
300 Hz
5V
10 V
4^695 to 5.0305
4.9680 to 5.0320
50 Hz
500 Hz
5 V
10 V
4.9790 to 5.0210
4.9775 to 5.0225
100 Hz
1 kHz
5V
10 V
4.9930 to 5.0070
4.9925 to 5.0075
10 kHz
10 kHz
6V
10 V
50 kHz
50 kHz
5V
10 V
100 kHz
100 kHz
5 V
10 V
30 Hz
300 Hz
10 V
10 V
9.9460 to 10.0540
9.9430 to 10.0570
50 Hz
500 Hz
10 V
10 V
9.9630 to 10.0370
9.9600 to 10.0400
100 Hz
1 kHz
10 V
10 V
9.9885 to 10.0115
9.9875 to 10.0125
10 kHz
10 kHz
10V
10 V
20 kHz
20 kHz
10 V
10 V
50 kHz
50 kHz
10 V
10 V
100 kHz
100 kHz
10 V
10 V
30 Hz
300 Hz
100 V
100 V
99.460 to 100.540
99.430 to 100.570
50 Hz
500 Hz
100 V
100 V
99.630 to 100.370
99.600 to 100.400
100 Hz
1 kHz
100 V
100 V
99.885 to 100.115
99.875to 100.125
10 kHz
10 kHz
100 V
100 V
50 kHz
50 kHz
100 V
100 V
100 kHz
too kHz
100 V
100 V
30 Hz
300 Hz
1000 V
1000 V
994.60 to 1005.40
994.30 to 1005.70
50 Hz
500 Hz
1000 V
1000 V
996.30 to 1003.70
996.00 to 1004.00
100 Hz
1 kHz
1000 V
1000 V
998.85 to 1001.15
998.75 to 1001.25
10 kHz
10 kHz
1000 V
1000 V
998 75 to 1001.25
998.65 to 1001.35
’These test limits do not include the temperature coefficients that must be added if the instrument
is operated outside of the temperature range over which the 24-hour or 90-day specifications
apply (see Table 1-1 ). Derive 6-month test limits from Accuracy Specifications listed in
Table 1-1.
4-15
Section IV
Model 3455A
Tible 4-1 B. Two-Wire Ohm Acciraey Twt
(A)
Test Umit!
(High Res. 0(f)
(8)
Test Limits
(High Res. On)
OeMde
Resiitor
345SA
Range
24 Hour •
90 Day*
24 Hour*
90 Day*
loon
t kn
0.1
1
'0.099593 to 0.100407
0.99956 to 1.00044
0.099590 toO.100410
099954 to 1.00046
0.999571 to 1.000429
0.999560 to 1 .000440
10 kn
10
9.9989 to 10.0011
9.9987 to 100013
9.99911 to 1000089
9.99895 to 10.00106
100 kn
100
99.996 to 100.004
99.994 to 100.006
999971 to 100.0029
99.9955 to 100.0045
1 Mn
1 K
999.8310 1000.17
999.81 to 1000.19
999.876 to 1000.124
999.860 to 1000.140
10 Mn
10 K
9989.5 to 10010.5
9989.510 10010.5
998996 to 1001004
9989.9510 10010.06
*Thete teti licniti do not include the tempefeture coefficient! that mutt be added if the intirumeni ii operated
outilda of the temperature ran9e over which the 24-hour or 90-day specif teat ioni apply (tee Table 1-1). Derive
6-mortth test limits from Ohmi Accuracy tpeciflcationt listed in Table t-1.
2. 345SA Option 001. Set the Test Oscillator fre-
quency to 2S0 kHz (maintain reference level on
meter of Test Oscillator). The 3455A display
reading should be between 5.9S20 V and 6.IM80
V (24-hour spec.) or between 5.9490 V and
6.0510 V (90-day spec.).
V. Set the 3455A FUNCTION to FAST ACV. Set the
Test Oscillator frequency to 10 kHz and adjust its level
controls for the 6 V 3455A reading recorded in Step m.
Adjust the meter reference controls for a zero reading
on the meter of the Test Oscillator and use the level con-
trols to maintain this reading whenever the frequency is
varied.
w. Repeat Step u.
X. This completes the AC Voltmeter Accuracy test.
Disconnect the Test Oscillator from the 3455A.
4-48. Ohmmeter Accuracy Tnt
4-49. This test requires a calibrated decade resistor with
settings that range from 100 ohms to 10 megohms. The
correction factors indicated on the decade resistor’s
calibration chart must be algebraically added to the
3455A display readings to achieve the required test ac-
curacy.
4-50. Tut Procedure.
Equipment Required:
Decade Resistor (calibrated General Radio
Model I433Z)
DC Voltmeter (-hp- Model 4I9A)
a. Set the 3455A controls as follows:
FUNCTION 2 WIRE K OHM
RANGE 0.1
HIGH RESOLUTION OFF
GUARD ON
b. Using a shielded cable equipped with banana-plug
connectors, connect the Decade Resistor to the INPUT
of the 3455A. Set the Decade Resistor to 100 ohms.
c. Algebraically add the Decade Resistor’s correction
factor to the 3455A reading. The algebraic sum should
be within the Test Limits given in Table 4-16(A), verify-
ing the 3455A 2-wire ohms accuracy with High Resolu-
tion off.
d. Repeat Step c for each Decade Resistor setting and
3455A Range listed in Table 4-16.
e. Set the 3455A RANGE to I and HIGH RESOLU-
TION to ON. Set the Decade Resistor to 1 ,000 ohms.
f. Algebraically add the Decade Resistor’s correction
factor to the 34SSA reading. The algebraic sum should
be within the Test Limits given in Table 4-16(B), verify
the 3455A 2-wire ohms accuracy with High Resolution
on.
g. Repeat Step f for each additional Decade Resistor
setting and 3455A Range listed in Table 4-16(A).
h. Set the 3455A controls as follows:
FUNCTION 4 WIRE K OHM
RANGE O.l
HIGH RESOLUTION OFF
i. Set the Decade Resistor to 100 ohms. Connect a
shielded cable, equipped with banana-plug connectors,
between the 3455A OHM SIGNAL output and the input
of the Decade Resistor. (Leave the other cable con-
nected between the 3455A INPUT and the input of the
Decade Resistor.)
j. Algebraically add the Decade Resistor’s correction
factor to the 3455A reading. The algebraic sum should
be within the Test Limits given in Table 4-1 7(A), verify-
ing the 3455A 4-wire ohms accuracy with High Reslu-
tion off.
k. Repeat Step j for each E)ecade Resistor setting and
3455A Range listed in Table 4-17(A).
4-16
Model 3455A
Section IV
TibU 4-17. Four-Wire Ohms Aecurocy Tost
(A)
Tew Limiti
(High Res. OH)
(B1
Test Limits
(High Res. On)
Decad6
Resiltor
3465A
Rangs
24 Hour •
90 Day*
24 Hour*
90 Day*
100 n
1 kn
0.1
1
0.099993 to 0,100007
099996 to 1.00004
0.099990 to 0.100010
099994 to 1.00006
0999971 to 1.000029
0.999960 to 1 .000040
10 kn
to
99993 to 10.0007
99991 TO 10.0009
999951 to 10.00049
9.99935 to 10.00065
100 kn
100
99 .996 to 100.004
99.994 to 100.006
99.9975 to 100.0025
99.9959 to 100.0041
1 Mil
1 K
999.83 to 1000.17
99991 to 1000.19
999.076 to 1000.124
999860 to 1000.140
10 MO
10 K
9989 5 to 10010.5
9989.5 to 10010.5
9989.96 to 10010.04
9989.95 to 10010.05
*Th»s« teti limits do not include the tempereture coefficients that must be added if the instrument is operated
outside of the tempereture rertge over which the 24-hour or 90-dav specifications apply (tee Table 1-1 ). Derive
6-monih test limits from Ohms Accuracy specifications listed in Table 1-1.
l. Set the 34S5A RANGE to I and HIGH RESOLU-
TION to ON. Set the Decade Resistor to 1,000 ohms.
m. Algebraically add the Decade Resistor’s correc-
tion factor to the 3455A reading. The algebraic sum
should be within the Test Limits given in Table 4-17(B),
verifying the 345SA 4-wire ohms accuracy with High
Resolution on.
n. Repeat Step I for each additional Decade Resistor
setting and 3455A Range listed in Table 4-17(B).
o. Set the 345SA RANGE to 10 K. Set the Decade
Resistor to 14.99 K.
p. Using the DC Voltmeter, measure the voltage
across the Decade Resistor terminals. The voltage
should be less than 4.7 V dc, verifying the maximum
output voltage specification for a valid ohms reading.
q. Disconnect the Decade Resistor. (Leave the 3455A
OHMS SIGNAL output connected to the INPUT).
r. Measure the voltage across the 3455A INPUT ter-
minals. The voltage should be less than S V dc, verifying
the maximum output voltage specification for an open-
circuit condition.
4-51. COMMON MODE AND NORMAL MODE REJECTION TEST.
4-52. Effective common-mode rejection is the ratio of
the peak common-mode voltage to the resultant peak er-
ror in the reading, with a I kilohm imbalance in the Low
input lead. The formula for calculating effective
common-mode rejection (ECMR) is:
ECMR ® ?n lAg Common-Mode Voltage
Effective on Reading (Volts)
4-53. Normal-mode rejection is the ratio of the peak ac
normal-mode voltage to the peak error it introduces in a
dc voltmeter reading. The formula for calculating
normal-mode rejection (NMR) is:
NMR = 20 log Superimposed Voltage
Effect on Reading (Volts)
4-54. Tut Pruadurt.
Equipment Required:
DC Standard (Systron Donner Model M106A)
AC Calibrator (-hp- Model 745A)
Frequency Counter (-hp- Model 5300A)
Resistor (I kfl ± 10% 1/4 W -hp- Part
Number 0684-1021)
Resistor (10 kft ± 10% 1/4 W -hp- Part
Number 0684-1031)
a. Connect the 1 K resistor between the 34S5A High
and Low INPUT terminals. Connect the GUARD ter-
minal to (he High INPUT terminal.
b. Set the 345SA controls as follows:
FUNCTION DCV
RANGE 1 V
HIGH RESOLUTION ON
GUARD OFF
c. Record the 3455A reading: V.
d. Connect the DC Standard (output off) between
the High INPUT terminal and the chassis of the 345SA
as shown in Figure 4-6.
e. Set the DC Standard for an output of + 500 V dc.
f. The 345SA reading should be within 0.00(X}50 V of
the reading recorded in Step c, verifying that the dc
common-mode rejection is greater than 140 dB.
g. This completes the dc common-mode Rejection
test. Turn off the DC Standard output and disconnect
the DC Standard from the 3455A. Disconnect the 1 K
resistor and connect the 10 K resistor across the 345SA
INPUT terminals (leave GUARD connected to High).
4-17
Model 3455A
Section IV
Figare 4-6. DC Common-Mode Rojoctioo Toot
h. Set (he AC Calibrator for an output of I V. Con- High and Low INPUT terminals,
nect the Frequency Counter to the output of the AC
Calibrator and adjust the AC Calibrator’s frequency to o. Set the 3455A RANGE to 10 V and record the
50 Hz or 60 Hz ± O.IV#, corresponding to the power- display reading: V.
line frequency being used.
p. Remove the jumper from the 3455A INPUT ter-
i. Record the 34S5A reading: V. minals. Connect the AC Calibrator output to the 34S5A
INPUT.
j. Disconnect the Frequency Counter and connect the
AC Calibrator between the High INPUT terminal and q. The 34S5A reading should be within 00.0100 V of
chassis of the 3455A as shown in Figure 4-7. the reading recorded in Step o, verifying that the 50 Hz
or 60 Hz normal-mode rejection is greater than 60 dB.
k. Without disturbing the frequency setting, set the
AC Calibrator for an output of 70.7 V (100 V peak). r. This completes the Common-Mode and Normal-
Mode Rejection Tests. Disconnect the AC Calibrator
1. The 3455A reading should be within 0.000010 V of from the 3455A and disconnect the GUARD from the
the reading recorded in Step i, verifying that the 50 Hz High INPUT terminal,
or 60 Hz ac common-mode rejection is greater than 160
dB.
4^55. DC VOLTMETER INPUT RESISTANCE TEST.
m. Without disturbing the frequency setting set the
AC Calibrator for an output of 7.07 V (10 V peak). Equipment Required:
Disconnect the AC Calibrator from the 3455A.
DC Standard (Systron Donner Model M106A)
n. Remove the 10 K resistor from the 3455A INPUT Resistor (1 MO ± 0.01 1/4 W -hp- Part
terminals. Connect a short jumper between the 3455A Number 0811-0202)
Model 3455A
Section IV
a. Connect the low output of the DC Standard to the
Low INPUT terminal of the 3455A. Using short clip
leads, insert the I megohm resistor in series between the
DC Standard’s high output and the High INPUT ter-
minal of the 34S5A. Connect a clip lead across the
resistor.
b. Set the 34SSA controls as follows:
FUNCTION DCV
RANGE 10 V
HIGH RESOLUTION ON
GUARD ON
c. Adjust the DC Standard for a 3455A reading of
+ 10.00000 V.
d. Remove the clip lead from across the I megohm
resistor.
e. The 345SA reading should be between 9.99900 V
and 10.00000 V, verifying that the input resistance is
greater than 10'() ohms.
f. Set the 3455A RANGE to 100 V; Auto-Cal OFF.
Reconnect the clip lead across the I megohm resistor.
g. Adjust the DC Standard for a 3455A reading of
+ 10.0000 V.
h. Remove the clip lead from across the 1 megohm
resistor.
i. The 3455A reading should be between + 9.0900 V
and + 9.0917 V, verifying that the input resistance is 10
megohms ± O.l'5'o.
4-56. AC VOLTMETER INPUT IMPEDANCE TEST.
Equipment Required:
Test Oscillator (-hp- Model 6S2A)
Resistor (I MO ± 0.1 Vo -hp- Part Number
0698-6369)
Resistor (100 kO O.lVo -hp- Part Number
0811-1997)
a. Set the 34S5A controls as follows:
FUNCTION ACV
RANGE 1 V
GUARD ON
INPUT SELECT (rear panel) .... FRONT
AUTO-CAL ON
b. Connect the Test Oscillator 50-ohm output (ter-
minated in SO-ohm load) to the 34SSA front panel IN-
PUT.
c. Set the Test Oscillator frequency to SO Hz and ad-
just its output level for a 34S5A reading of 1.00000 V.
d. Using short clip leads, insert the 1 megohm
resistor in series between the terminated Test Oscillator
output and the High INPUT terminal of the 3455A.
e. The 3455A reading should be between 0.66443 V
and 0.66887 V, verifying that the input resistance is 2
megohms ± IVo.
f. Disconnect the resistor and reconnect the Test
Oscillator output to the 3455A INPUT.
g. Set the Test Oscillator frequency to 20 kHz and
adjust its output level fora 34SSA reading of 1. 00000 V.
h. Using short clip leads, insert the 100 kilohm
resistor in series between the terminated Test Oscillator
output and the High INPUT terminal of the 3455A.
i. The 3455A reading should be greater than
0.61017 V, verifying that the input shunt capacitance is
less than 100 pF.
j. Set the rear panel INPUT SELECT switch to
REAR. Connect the Test Oscillator 50-ohm output (ter-
minated in 50-ohm load) to the 3455A rear-panel IN-
PUT.
k. Repeat Steps c through i to test the input im-
pedance at the rear INPUT terminals. In Step i, the
3455A reading should be greater than 0.70822 V verify-
ing that the rear terminal input shunt capacitance is less
than 75 pF.
4-19/4-20
OPERATIONAL VERIFICATION TEST CARD
Hawlatt-Psckard Modal 3455A (Standard)
Digital Voltmatar
Sarial No.
T«*tJ Parfonnad By
Data
DC ACCURACY TEST
Input
Laval
3466A
Range
High
Ratoiulion
3455A
^tltiva
Raadirtg
34S6A
Nagativa
Reading
Tatt Limitt*
0.1 V
1 V
1 V
6V
10 V
10 V
100 V
1000 V
0.1 V
1 V
10 V
10 V
10 V
10 V
100 V
1000 V
OFF
ON
ON
ON
ON
OFF
ON
ON
*Racord 34-hour or 90-day tatt llmha from tabla datignatad in tatt proca-
dure. Dariva 6-month tatt limitt from tpacificatlont linad in Tabla 1-1.
**For potitiva raadingi only. Do not apply nagetrva voltagai greater than
-SOOVdc.
AC VOLTMETER ACCURACY TEST 30 Hz TO 1 MHz
(Standard Modal 3455A Only)
Frtqu«r>cv
Input
Laval
3455A
Range
3455A
Reading
(ACV)
34SSA
Reading
(FAST ACV)
Tatt Limitt**
30 Hz*
1 V
1 V
100 kHz
1 V
1 V
350 kHz
5V
10 V
30 Hz*
6V
10 V
too kHz
6 V
10 V
1 MHz
1 V
1 V
1 MHz
6V
10 V
30 Hz*
10 V
10 V
30 kHz
10 V
10 V
100 kHz
10 V
10 V
30 Hz*
100 V
100 V
100 kHz
100 V
100 V
30 Hz*
1000 V
1000 V
10 kHz
1000 V
1
1000 V
*ACV Function Only
"Record 34-hour or 9Dday tatt limitt from tha tabiei datignatad in the
tatt procadura. Derive 6-month teat limitt from tpacificationi littad In
Tabla t-t.
1
OPERATIONAL VERIFICATION TEST CARD (Cont'd)
OHMS ACCURACY TEST
Decade
Resistor
3465A
Range
Ohms
Furtction
Reading |
Test Limits*
100 Q
0.1
4 Wire
1 kO
1
4 Wire
10 kO
10
4 Wire
100 kO
100
4 Wire
inn
100
2 Wire
t MU
1 K
4 Wire
10 MU
10 K
4 Wire
*R»cord 24-hour or 90-dsy left limit* from table de*lgnated in teit
procedure. Derive 6-mondi ie*t limits from tpecification* listed in
Table 1-1.
DC VOLTMETER INPUT RESISTANCE TEST
3455A
Range
Test
Reading
Test Limits
10 V
V
9.99900 V to 10.00000 V
100 V
V
9.0900 V to 9.0917 V
2
OPERATIONAL VERIFICATION TEST CARO
Hewlett-Packard Model 3455A (Option 001 1 Teat Perlormed 8yi
Digital Voltmeter Date
Serial
DC ACCURACY TEST
Input
Level
345SA
Range
High
Resolution
345SA
Positive
Reading
345SA
Negative
Reading
Test Limits*
0.1 V
0.1 V
OFF
1 V
1 V
ON
1 V
lOV
ON
5 V
10 V
ON
10 V
10 V
ON
10 V
10 V
OFF
100 V
100 V
ON
1000 V“
1000 V
ON
‘Record 24-tiour or 90-day test limite from table desigrtated in test
procedure- Derive 6-month test limits from specifications listed In
Table 1-1-
‘ ‘For positive reading only. Do not apply negative voltages greater
than -500 V dc.
AC VOLTMETER ACCURACY TEST (OPTION 001 ONLY)
Frequeiscy
(ACVI
Frequertey
(FAST ACV)
Input
Level
34S5A
Range
3455A
Reading
(ACV)
3455A
Reading
(FAST ACV)
Test Limits‘
30 Hz
60 Hz
250 kHz
30 Hz
100 Hz
250 kHz
30 Hz
100 Hz
100 kHz
30 Hz
100 kHz
30 Hz
10 kHz
300 Hz
500 Hz
250 kHz
300 Hz
100 kHz
250 kHz
300 Hz
1 kHz
100 kHz
300 Hz
100 kHz
300 Hz
10 kHz
1 V
1 V
1 V
5V
5V
5V
10 V
10 V
10 V
100V
100 V
1000 V
1000 V
1 V
1 V
1 V
10 V
10 V
10 V
10 V
10 V
10 V
100 V
100 V
1000 V
1000 V
‘Record 24-hour or 90-day test limits from tables designated in the test procedure- Derive &monih
test limits from specifications listed in Table 1-1.
1
OPERATIONAL VERIFICATION TEST CARO (Cont'd).
OHMS ACCURACY TEST
Decade
Ratlitor
3455A
Range
Ohms
Function
Reading
Tait Limits*
1000
0.1
4 Wire
1 kO
1
4 Wire
10 kO
10
4 Wire
100 kO
100
4 Wire
irtft i»n
inn
2 Wire
1 MO
1 K
4 Wire
10 MO
10K
4Wire
‘Record 34-hour or 90-dty tett llmin from table daeignatad In teti
procadura. Derive 6-month teet limits from tpecificeiions lilted in
Teble 1-1.
DC VOLTMETER INPUT RESISTANCE TEST
3456A
Test
Range
Reading
Test Limits
10 V
V
9.99900 V to 10.00000 V
100 V
V
9.0900 V to 9.0917 V
2
PERFORMANCE TEST CARO
Hewlett-Packard Model 34S5A (Standard Model Only)
Digital Voltmeter
Serial Mo
Te»t» Performed 8v .
Date
OC ACCURACY TEST (High Reiolution off!
(nput
Level
3455A
Range
3455A
Positive
Raadiiv)
34S5A
Nagetive
Reading
Tost Limits*
1 V
1 V
10 V
10 V
1000 V**
1000 V
—
600 V
1000 V
too V
100 V
0.1 V
0.1 V
'Record 24-hour or 90-day lett limit! from table detignated m tett procedure.
Derive 6-month ie$t hmli« from specifications listed in Table 1 -1 .
* *For positive readings only. Do not apply negative voltages greater than - 500 V dc.
DC ACCURACY TEST (High Resolution on)
Input
Level
3455A
Range
3455A
Positive
Reading
3455A ,
Negative '
Reading
Test Limits*
1 V
1 V
10 V
10 V
1000 V**
1000 V
500 V
1000 V
100 V
1000 V
100 V
100 V
60 V
100 V
10 V
100 V
5 V
10 V
1 V
10 V
0.6 V
1 V
0.1 V
1 V
'Record 24-hour or 90-day test limits from table designated in test
procedure. Derive 6-month test limits from specifications listed in
Table 1-1-
**Por posJtlw readings only, Do r>ot apply negative voltages greater
than- 500 Vdc.
1
PERFORMANCE TEST CARD (Cont'd)
AC VOLTMETER ACCURACY TEST 30 H* TO 1 MHi
(Standard Model 34S5A only)
Test
Frequency
Input
Level
34S6A
Range
3455A
Reeding
(ACVJ
3455A
Reading
(FAST ACV»
Test Limits**
30 Hi*
300 Hi
lOkHi
20 kHz
60 kHz
100 kHz
1 V
1 V
1 V
1 V
1 V
1 V
1 V
1 V
1 V
1 V
1 V
1 V
_ - - . ,
30 Hz*
300 Hz
20 kHz
too kHz
■
10 V
lOV
10 V
10 V
—
30 Hz*
60 Hz*
100 Hz*
600 Hz
1 kHz
5 kHz
10 kHz
20 kHz
50 kHz
100 kHz
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
10 V
— . —
„
30 Hz*
300 Hz
10 kHz
20 kHz
10O kHz
100 V
100 V
100 V
100 V
100 V
100 V
100 V
lOOV
100 V
100 V
30 Hz*
300 Hz
10 kHz
110 kHz
250 kHz
500 kHz
1 MHz
1000 V
1000 V
1000 V
1 V
1 V
1 V
1 V
1000 V
1000 V
1000 V
1 V
1 V
1 V
1 V
110 kHz
260 kHz
500 kHz
1 MHz
6V
6V
6V
6V
10 V
10 V
10 V
10 V
•ACV Function Only
"Record 24-Kour or 90-day test limits from the tables designated in the
test procedure. Derive 6-rr>onth test limits from specifications listed in
Table 1-1.
2
PERFORMANCE TEST CARO (Cont'd)
TWO-WIRE OHMS ACCURACY TEST
High
Re*. Off
1 High Ret. On
Decade
Resistor
3486A
Range
Reading
Tasi Limits'
Reading
Test Limits'
lOOn
0.1
1 kf)
1
10 kn
10
100 kn
100
1 Mn
1 K
10 Mn
10 K
'Record ZA-hour or 9(Mav test limit* from table deiigntted in leti
procedure. Derive 6-monih te*l limit* from *p*clficaiion* li*ted in
Table 1-t.
FOUR-WIRE OHMS ACCURACY TEST
Decade
Resistor
3455A
Range
High
Resdirtg
Ret. Off
Test Limh*'
High
Reading
Res. On
Test Limits*
100 n
0.1
1 kn
1
10 kn
10
i(x> kn
100
I Mn
1 K
10 Mn
10K
'Record 24-hour or 90-day lett limit* from table designated in ten
procedure. Derive 6-monih test limit* from ipecificationt listed in
Table 1-1,
OHMS VOLTAGE TEST
Voltage for Valid Reading; V « 4.7 V dc)
Open-Circuit Voltaee: V t< 5 V del
COMMON-MODE AND NORMAL-MODE REJECTION TESTS
Reference
Step
Reference
Reading
Test
3455A 1
Reading
Test Limit
(Refailve to Raferertcel
e.
OC-CMR
tO.OOOOSOV
i.
AC-CMR
t 0.000010 V
0.
NMR
1 0.0100 V
DC VOLTMETER INPUT RESISTANCE TEST
3456A
Test
Range
Reading
Test Limits
10 V
V
9S9900 V to 10.00000 V
100 V
V
9.09(X>Vto9X)917V
AC VOLTMETER INPUT IMPEDANCE TEST
Front-Terminal Reading (Steps): V (0.66443 V to 0.66887 V)
Front-Terminal Reading IStao »: V (>0.61017)
Rear-Tarminal Reading (Step el: (0.66443 V to 0.66867 V)
Rear- Terminal Reading (Slap k); V (> 0.70832)
3
PERFORMANCE TEST CARD
Hewlett-Packard Model 3455A (Option 001 only)
Oisitel Voltmeter
Serial Mn
Tests Performed By:,
Date
DC ACCURACY TEST (High Resolution off)
Input
Level
345SA
Range
3466A
Positive
Reading
3466A
Negative
Reading
Test Umits‘
1 V
1 V
10 V
1000 V“
600 V
10 V
1000 V
1000 V
^ ^ ^
100 V
100 V
0.1 V
0.1 V
‘Record 34-hour or 90-day test limits from table designated in test procedure.
Derive 6-month test limits from specifications listed in Table 1-1.
* *For positive readings only. Do not apply negative voltages greater than - SOO V dc.
DC ACCURACY TEST (High Resolution on)
Input
Level
345SA
Range
34SSA
Positive
Reading
34S5A
Negative
Reading
Test Limits*
1 V
1 V
10 V
1000 V“
500 V
100 V
10 V
1000 V
1000 V
1000 V
100 V
100 V
so V
100 V
10 V
100 V
5V
10 V
1 V
10 V
0.6 V
1 V
0.1 V
1 V
‘Record 24-hour or 90-day test limits from table designated in test
procedure. Derive 6-month test limits from specifications listed in
Table 1-1.
“For positive readings only. Do rtot apply negative voltages greater
than -500 Vdc.
1
PERFORMANCE TEST CARD (Cont'd)
TWO-WIRE OHMS ACCURACY TEST
Decade
Resistor
34SSA
Range
High
Reading
Ret. Off
Test Limits*
High
Reading
Res. On
Test Limits*
100 n
0.1
j
1 kn
1
tokn
10
too kn
100
t Mn
1 K
10 Mn
10 K
*R«cord 24-hour or 90-day ia*t limit* from table desisnaiad irt te*t
procedure. Derive S-mortth lett limits from speclficaiion* listed in
Table 1-1.
FOUR-WIRE OHMS ACCURACY TEST
Decade
Resistor
3455A
Range
Hl^
Reading
Ret. Off
Test Limits*
High
Reading
Res. On
Test Limits*
100 n
0.1
1 kn
1
10 kn
10
100 kn
100
1 Mn
1 K
10 Mn
10 K
'Record 24-hour or 90-day test limits from table designated In test
procedure. Derive 6-month test limits from ss>ecifications listed in
Table 1-1-
OHMS VOLTAGE TEST
Voltage for Valid Reading- V « 4.7 V dc)
Open-Circuit Voltaae: V « 6 V del
COMMON-MODE AND NORMAL-MODE REJECTION TESTS
Reference |
Step
Reference
RMding
Test
345SA
Reading
Test Limit
(Relative to Referettcel
c.
DC-CMR
1
1 0.000050 V
1 .
AC-CMR
t 0.000010 V
0.
NMR
1 0.0100 V
DC VOLTMETER INPUT RESISTANCE TEST
3456A
Test
Range
Reading
Test Limits
10 V
V
9.99900 V tp 10.00000 V
100 V
V
9.0900 V to 9.091 7 V
AC VOLTMETER INPUT IMPEDANCE TEST
Front-Terminal Reading (Step a):
Front-Terminal Reeding (Step I):
Rear-Terminal Reading (Step a):
Rear-Terminal Reading (Step k):
V (0.66443 V to 0.66887 VI
V 00.61017)
V (0.66443 V to 0.66887 V)
V 0 0.70822)
2
PERFORMANCE TEST CARD (Cont'd)
AC VOLTMETER ACCURACY TEST (OPTION 001 ONLY)
34S5A 345SA
Frsquency | Fraguencv I Input | 345EA Reading Reading
lACV) (FASTACVI Level Range (ACV) IFASTACVI Teit Umi»*
X Hz 300 Hz IV IV
50 Hz 500 Hz IV IV
100 Hz 1 kHz IV IV
10 kHz 10 kHz IV IV
50 kHz 50 kHz IV IV
100 kHz 100 kHz IV IV
X Hz
50 Hz
100 Hz
10 kHz
50 kHz
too kHz
300 Hz
500 Hz
1 kHz
10 kHz
50 kHz
100 kHz
X Hz
300 Hz
10 V
10 V
50 Hz
500 Hz
10 V
10 V
100 Hz
1 kHz
tov
10 V
10 kHz
10 kHz
10 V
10 V
20 kHz
20 kHz
10 V
tov
50 kHz
50 kHz
10 V
10 V
100 kHz
100 kHz
10 V
10 V
XHz
300 Hz
100 V
100 V
SO Hz
500 Hz
100 V
100 V
100 Hz
1 kHz
100 V
100 V
10 kHz
10 kHz
100 V
100 V
50 kHz
50 kHz
100 V
100 V
100 kHz
100 kHz
100 V
100 V
XHz 300 Hz
50 Hz 500 Hz
100 Hz 1 kHz
10 kHz 10 kHz
250 kHz 250 kHz
250 kHz 250 kHz
1000 V
1000 V
1000 V
1000 V
1 V
6V
1000 V
1000 V
1000 V
1000 V
1 V
10 V
‘Record 24-hour or 90-dav teft limits from tables designated in tfw
test procedure. Derive 6-month test limits from specifications listed
in Table 1-1.
3
Maintenance described herein is performed
with power supplied to the instrument, and pro-
tective covers removed. Such maintenance
should be performed only by service-trained
personnel who are aware of the hazards in-
volved {for example, fire and electrical shock).
Where maintenance can be performed without
power applied, the power should be removed.
Model 3455A
Section V
SECTION V
ADJUSTMENTS
S-1. INTRODUCTION.
S-2. This section contains complete adjustment procedures
for the Model 34S5A Digital Voltmeter. After the instru-
ment is adjusted according to the procedures given in this
section, it should meet the 24-hour accuracy specifications
listed in Table 1-1.
5- 3. EQUIPMENT REQUIRED.
S4. The test equipment required for the adjustments is
listed at the beginning of each adjustment procedure and
in the Recommended Test Equipment table in Section I.
If the recommended equipment is not available, use sub-
stitute equipment that meets the critical specifications
given in the table.
6- 5. ADJUSTMENT INTERVAL.
5-6. The 3455A adjustments should be performed at 90-
day or 6-month intervals depending on the environmental
conditions and your specific accuracy requirements. Adjust-
ments should also be performed after the instrument has
been repeaired.
5-7. ADJUSTMENT SEQUENCE.
5-8. The 3455A Adjustments must be performed in the
sequence in which they are presented. If the dc and ohms
accuracy of the instrument are satisfactory, the DC Zero
Adjustments and Reference Adjustments can be omitted
and the RMS or Average Converter adjustments can be
performed to optimize the ac voltmeter accuracy.
5-9. TEST POINT AND ADJUSTMENT LOCATIONS.
S-10. Test points and adjustments arc labeled on the top
inner cover and rear panel (Reference Module) of the
instrument or arc shown in figures designated in the adjust-
ment procedures.
S-11. DC ZERO ADJUSTMENTS.
Equipment Required:
DC Digital Voltmeter (-hp- Model 3490A or 3455A)
a. Remove the 34SSA top outer cover and top inner
cover to gain access to the AlO (Mother) board.
b. Set the 34SSA controls as follows:
FUNCTION DCV
Figure 5-1. 100 Volt Zero Adjustment.
RANGE 10 V
HIGH RESOLUTION ON
AUTO CAL OFF
GUARD ON
TRIGGER INT
MATH OFF
c. Set the test DVM to measure dc volts (autorange).
Connect the DVM’s low input to the A1 0 board ground test
point and the high input to AlOTOI (Figure 5-1).
d. Adjust A10R66 (Figure 5-1) for a DVM reading of
0 V ± 50 microvolt. Disconnect the test DVM.
e. Set the 3455A RANGE to lOOVand AUTOCALto
ON. The 3455A Reading should be 0.0000 V ± 1 count. If
it is not, repeat Steps b through d. If this does not correct
the problem, refer to Section VIII for troubleshooting
information.
f. Reinstall the top inner cover with two or three screws
and reinstall the lop outer cover (bottom covers must be
installed).
g. Set the 3455A RANGF. to 1 V. Connect a copper
shorting strap across the 3455A INPUT terminals.
h. Allow the 3455A to run at room temperature for
at least 30 minutes.
i. The 3455A reading should be 0.000000 V ± 4 counts.
If it is, proceed to the DC Reference Adjustments (Para-
graph 5-12). If it is not. it will be necessary to change the
value of padding resistor AlORIlO as outlined in the
following steps.
j. Record the 3455 A reading: .
5-1
Section V
Model 3455A
k. Remove the top covers and note the value of
A10R106 — if there is an R1 10 installed (sec Figure 5-2).
Refer to Table 5-1 and record the Offset Voltage that cor-
responds to the current value of AlORl 10: (If there
is no AlORl 10, record 0.000000 V.) If R1 10 is connected
to the terminal marked “+”. the polarity of the Offset
Voltage is negative: if RllO is connected to the terminal
marked the polarity of the offset is positive.
l. Add the voltages recorded in Steps j and k to obtain
the total offset:
m. Refer to Table 5-1 and locate the Offset Voltage
that is closest to the total offset voltage recorded in Step I.
Obtain a resistor that corresponds to that offset voltage.
n. Remove the original AlORl 10 (Figure 5-2). If the
total offset (Step I) is positive, connect the new RllO
between the unmarked terminal and the terminal marked
if the total offset is negative, connect it between the
unmarked terminal and the terminal marked “+”.
o. Reinstall the top covers and again allow the instru-
ment to run at room temperature for 30 minutes. At the
end of that period, the 34SSA reading should be
0.000000 V ± 4 counts. If it is not. repeat Steps j through
n.
Table 5-1. DC Zero Adjustment Padding List (A10R110).
Offset
Voltage
Resistor
Value*
-hp- Part No.
0.6 mV
3M
0683-3055
1.0 mV
1.5 M
0683-1555
1.6 mV
1.0 M
0683-1055
2.0 mV
750 K
0683-7545
2.5 mV
620 K
0683-6245
3.0 mV
510 K
0683-5145
3.5 mV
430 K
0683-4345
4.0 mV
360 K
0683-3645
4.6 mV
330K
0683-3345
5.0 mV
300 K
0683-3045
*AII resistors are t 5%, 1/4 W. Carbon.
5-12. DC AND OHMS REFERENCE ADJUSTMENTS.
S-i3. The IX Transfer Standard required for the following
adjustments must be adjusted for optimum I-volt and
10-volt output accuracy using NBS-calibrated voltage
standards. The Transfer Standard should be adjusted just
prior to use. After adjustment, it should be left on and, if
possible, kept in a controlled environment where the
ambient temperature is within one or two degrees of the
temperature at which it was adjusted. The following pro-
cedure should be performed in that same environment.
S-14. Adjustment Procedure.
Equipment Required:
DC Transfer Standard (Ruke Model 731 A)
Standard Resistor (1 kilohm ± 0.0005%; Guildline
9330/1 K)
Standard Resistor (100 kilohm 1 0.002%: Guildlinc
9330/100 K)
NOTE
Ail of the reference adjustments are screw-
driver adjustments and are accessible through
holes in the rear panel of the Reference Module
(rear panel of instrument). Adjustment
Designators are marked on the panel The
adjustments should be performed after a 30-
minute warmup period with all covers installed.
a. Set the 3455A controls as follows:
FUNCTION DCV
RANGE 10 V
HIGH RESOLUTION ON
AUTO CAL ON
GUARD ON
TRIGGER INT
MATH OFF
b. Set the DC Transfer Standard for an output of 10 V.
Using short pieces of number 20 AWG (or larger) insulated
solid copper wire, connect the output of the Transfer Stan-
dard to the 3455A INPUT.
c. Adjust the 10 V pot for a 3455A reading of
t 10.00000 V.
d. Set the Transfer Standard for an output of 1 V. Set
the 34S5A RANGE to I V.
e. Adjust the 10:1 pot for a 345SA reading of
1.000000 V(± 1 count).
f. Set the 3455A RANGF. to 10 V and set the Transfer
Standard for an output of 10 V.
g. Repeat Steps c through f until optimum adjustment
is obtained.
5-2
Model 3455A
Section V
h. Disconnect the DC Transfer Standard. Set the 3455A
FUNCTION to 4-WIRE K OHMS and RANGE to 1 .
i. Using short pieces of number 20 AWG insulated solid
copper wire, connect the 1 kilohm Standard Resistor to the
3455A INPUT and OHMS SIGNAL terminals in a 4-wire
ohms measurement configuration.
j. Adjust the 1 kilohm pot for a 3455A reading of
1.000000 kilohm.
k. Disconnect the 1 kilohm Standard Resistor and
connect the 100 K standard resistor using the same 4-
wire ohm measurement configuration.
l. Set the 34S5A RANGE to 100.
m. Adjust the 1 megohm pot for a 3455A reading of
100.0000 kilohm (± 1 count).
n. Set the 3455A RANGE to 1 . Repeat Steps i throu^
m to obtain optimum adjustment.
5-15. RMS CONVERTER ADJUSTMENTS (A1S Assy.,
Standard Model 3455A Only).
NOTE
For 3455A Option 001 instruments, refer to
the Average Converter Adjustments (Para-
graph 5-16).
Equipment Required:
AC/DC Digital Voltmeter (-hp- Model 3490A or
3455A)
DC Standard (Systron Donner Model 106A)
AC Calibrator (-hp- Model 745 A)
a. Set the 345SA controls as follows:
FUNCTION ACV
RANGE 10 V
AUTO CAL ON
GUARD ON
TRIGGER INT
MATH OFF
AC-AC/DC(Rear Panel) AC
b. Connect a short across the 3455A INPUT terminals.
c. Set the Digital Voltmeter (DVM) to measure dc volts
(auto range). Connect the DVM low input terminal to TP6
and the high input terminal to TPS.
d. Adjust R65 (PREAMP OFFSET ADJ) for a DVM
reading of 0 V ± 10 microvolt.
e. Connect the DVM Low to TP6 and High to TPS.
Adjust R56 (ABS AMP OFFSET ADJ) for a DVM reading
ofO V ± 10 microvolts.
f. Disconnect the DVM. Connect a clip lead between
TP3 and TP6. Adjust R16 (INT AMP OFFSET) for a
345SA display reading of 0 V ± 1 count.
g. Remove the clip lead from TP3 and TP6. Adjust R29
(LOGGER AMP OFFSET) for a 3455A display reading
between 0.0998 V and 0.1002 V with a 100 mV, 100 Hz
signal applied to the input terminals.
h. Set the rear panel AC - AC/DC switch to AC/DC. Set
the DC Standard for an output of 10 V dc. Connect the DC
Standard output (Negative Polarity) to the 34S5A INPUT.
i. Note the 34SSA reading.
j. Reverse the polarity of the DC Standard’s output and
note the 34SSA reading.
k. Adjust R51 (AC- DC TURNOVER ADJ) so that the
readings in Steps i and j are equal ± 0.0005 V.
l. Disconnect the DC Standard from the 3455A INPUT.
Set the rear panel AC-AC/DC switch to AC.
m. Set the 3455A RANGE to I V. Connect the DVM
(AC function, autorange) Low to TP6 and Hi^ to TPS.
Set the AC Calibrator for an output of 1 V, 100 Hz. Con-
nect the AC Calibrator output to the 3455A INPUT.
n. Adjust R74 (1 V, 100 Hz ADJ) for a DVM reading
of 1.00000 V ± 1 count. Disconnect the DVM.
0 . Adjust R17 (GAIN) for a 3455A reading of
1 .00000 V ± 5 counts.
NOTE
If, in the following steps, there is insufficient
adjustment range for the 1 V, 10 V or 100 V
high-frequency (40 kHz) adjustment, the
adjustment range can be expanded by remov-
ing the appropriate jumper wire on the A15
board (see Table 5-2). Refer to the AIS
board component locator (Section VIII) for
jumper locations.
p. Set the AC Calibrator frequency to 40 kHz. Adjust
R75 (1 V, 40 kHz ADJ) for a 34S5A reading of 1.00010 V
(tolerance = + 20 counts).
q. Set the 3455A RANGE to 10 V. Set the AC Calibra-
tor for an output of 10 V, 100 Hz, Adjust R73 (10 V,
100 Hz ADJ) for a 3455A display reading of 10.0000 V
± 5 counts.
T. Set the AC Calibrator frequency to 40 kHz. Adjust
R72 (10 V. 40 kHz ADJ) for a 3455A reading of
10.0010 V (tolerance = + 20 counts).
s. Set the 345SA RANGE to 100 V. Set the AC Cali-
brator for an output of 100 V, 100 Hz. Adjust R94 (100 V,
100 Hz ADJ) for a 3455A reading of 100.000 V ± 5 counts.
5-3
Section V
Model 3455A
t. Set the AC Calibrator frequency to 40 kHz. Adjust
C34 (100 V, 40 kHz ADJ) for a 3455A reading of
100.010 V (tolerance = + 20 counts).
u. Set the AC Calibrator for an output of 1 V, 100 Hz.
Set the 3455A RANGE to 1 V. Repeat Steps o through u
until optimum adjustment is obtained.
Table S-2. Jumper Removal (A15 board).
Adiuttment
Remove
1 V, 40 kHr
10 V. 40 kHz
100 V, 40 kHz
Jumper 2
Jumper 3
Jumper 1
5-16. AVERAGE CONVERTER ADJUSTMENTS (A13
Assy., 3455A Option 001 Only).
5-17. The following adjustments require an AC Calibrator
such as the -hp- Model 745A. For optimum adjustment ac-
curacy. the AC Calibrator should be calibrated at I V, 10 V
and 100 V at 100 kHz. The AC Calibrator's error measure-
ment control should then be used to adjust out the
100 kHz errors indicated on the calibration chart. For
example, if the calibration chart indicates that the 74SA
output is 0.04% high at 1 V, 100 kHz. set the error mea-
surement control to + 0.04% to obtain a precise 1 V
output. The 74SA can be calibrated during a routine per-
formance test using the procedures outlined in the 745A
Operating and Service Manual.
5-18. Adjustment Procedure.
Equipment Required:
AC Calibrator (-hp- Model 745A)
a. Set the 34S5A controls as follows:
FUNCTION ACV
RANGE IV
AUTO CAL ON
GUARD ON
TRIGGER INT
MATH OFF
b. Set the AC Calibrator for an output of 10 mV,
1 kHz. Connect the AC Calibrator output to the 34SSA
INPUT.
c. Adjust R12 (DC OFFSET) for a 3455A reading of
0.01000 V ± 3 counts.
d. Set the AC Calibrator to 1 V, 100 kHz (use error
measurement control). Adjust R13 (1 V HI FREQ) for a
345SA reading of 1 .00000 V ± 5 counts.
e. Set the AC Calibrator frequency to 1 kHz (turn off
error measurement control). Adjust R36 (1 V LOW FREQ)
for a 3455A reading of 1 .00000 V ± 5 counts.
f. Set the 3455A RANGE to 10 V. Set the AC Calibra-
tor to 10 V, 1 kHz. Adjust R23 (10 V LOW FREQ) for a
34S5A reading of 10.0000 V ± S counts.
NOTE
If, in the following steps, there is insufficient
adjustment range for the 10 V or 100 V high-
frequency (100 kHz) adjustment, the adjust-
ment range can be expanded by removing the
appropriate jumper wire on the AI3 board
(see Table 5-3). Refer to the AI3 board com-
ponent locator (Section VUIj for jumper
locations.
g. Set the AC Calibrator frequency to 100 kHz. Adjust
CIS (10 V HI FREQ) for a 3455A reading of 10,0000 V
± 10 counts.
h. Set the 3455A RANGE to 100 V. Set the AC Cali-
brator to 100 V. 1 kHz. Adjust R46 (100 V LOW FREQ)
for a 3455 A reading of 1 00.000 V ± 5 counts.
i. Set the AC Calibrator frequency to 100 kHz. Adjust
C34 (100 V HI FREQ) for a 3455A reading of 100.000 V
± 10 counts.
j. Repeat Steps d through i until optimum adjustment is
obtained.
Table 5-3. Jumper Removal (A13 board).
Adjuttritent
Remove
10 V. too kHz
100 V. 100 kHz
Jumper 2
Jumper 1
5-4
Model 34S5A
Section VI
SECTION VI
REPLACEABLE PARTS
6-1. INTRODUCTION.
6-2. This section contains information for ordering replace-
ment parts. Table 6-3 lists parts in alphameric order of their
reference designators and indicates the description, -hp-
Part Number of each part, together with any applicable
notes, and provides the following:
a. Total quantity used in the instrument (Qty column).
The total quantity of a part is given the first time the part
number appears.
b. Description of the part. (See abbreviations listed in
Table 6-1.)
c. Typical manufacturer of the part in a five-digit code.
(See Table 6-2 for list of manufacturers.)
d. Manufacturers part number.
6-3. Miscellaneous parts are listed at the end of Table 6-3.
64. ORDERING INFORMATION.
6-5. To obtain replacement parts, address order or inquiry
to your local Hewlett-Packard Field Office. (Field Office
locations are listed at the back of the manual.) Identify
parts by their Hewlett-Packard part numbers. Include
instrument model and serial numbers.
6-6. NON-LISTEO PARTS.
6-7. To obtain a part that is not listed, include:
a. Instrument model number.
b. Instrument serial number.
c. Description of the part.
d. Function and location of the part.
6-8. PARTS CHANGES.
6-9. Components which have been changed are so marked
by one of three symbols; i.e.. A, A with a letter subscript,
e.g.. A 3 , or A with a number subscript, e.g., A| 0 . A A with
no subscript indicates the component listed is the preferred
replacement for an earlier component. A A with a letter
subscript indicates a change which is explained in a note at
the bottom of the page. A A with a number subscript indi-
cates the related change is discussed in backdating (Section
VII). The number of the subscript indicates the number of
the change in backdating which should be referred to.
6-10. PROPRIETARY PARTS.
6-11. Items marked by a dagger (t) in the reference desig-
Table 6-1. Standard Abbreviations.
6-1
Section VI
Model 3455A
nator column are available only for repair and service of
Hewlett-Packard Instruments.
6-12. EXCHANGE ASSEMBLIES.
6-13. Exchange assemblies are factory repaired and tested
assemblies and are available only on a trade-in basis; there-
fore, the defective assembly must be returned for credit.
For this reason, assemblies required for spare parts stock
must be ordered by the new assembly part num^r listed in
Table 6-3.
6-14. For service convenience, the Processor Assembly
(A3) and Reference Assembly (A1 1) may be replaced on an
exchange basis. Use the following part numbers and descrip-
tions when ordering the exchange assemblies.
Processor Eschange Assembly (A3), -hp- part number
03455-69503,
Reference Exchange Assembly (All), -hp- part num-
ber 11177-69501
6-15. SERVICE KIT.
6-16. A service kit is available to aid in the repair of the
345SA. This kit contains Processor and Reference Assem-
blies (A3 and A1 1) and selected components necessary for
efficient repair. The Service Kit may be ordered through
your nearest Hewlett-Packard OlTice. Order Service Kit
Number 03455-69800.
Table 6-2. Code List of Manufacturers.
Manufacturer
Number
Manufacturer Name
Address
FR002
EFCO Componantt
Saini-Malo France 35
GM077
Amp Deutschland
Germany
00000
U.S.A. Common
Any Supplier of the U.S.
0011J
Jermyn Irxlustries
0022U
Uitited Chemicon Inc
01121
Allen-Bradley Co
Milwaukee. Wl 53212
01295
Texas Instr Inc Semicond Cmpnt Oiv
Dalles, TX 75231
02735
RCA Corp Solid Stats Oiv
Sommerville, NJ 08876
03888
KDI Pyroftlm Corp
Whippiny, NJ 07981
04713
Motorola Semicortductor Products
Phoenix, AZ 85008
07263
Fairchild Semicor>ductor Oiv
Mountain View. CA 94040
11236
CTS of Berne Inc
Berne, IN 46711
11237
CTS Keene Inc
11S02
TRW Inc 6oona Oiv
Boone, NC 28607
14140
Edison Elek Oiv McGraw-Edlson
Manchester. NH 03130
15818
Teledyne Semiconductor
Mountain View. CA 94040
16365
Dayton Roeers Mfg Co
Minneapolis, MN 55407
17856
Sellconix Inc
Santa Clara. CA 95050
19701
Mepco/Electrs Corp
Minaral Wells. TX 76067
24226
Gowstrda Electronics Corp
Gowanda. NY 14070
24355
Analog Devices lr>c
Norwood, MA 02062
24546
Cornirrg Glass Works (Bradford)
Bradford, PA 16701
24931
Specialty Connector Co Inc
Indianapolis, IN 46227
27014
National Semiconductor Corp
Santa Clara, CA 95051
27264
Molax Products Co
Downers Grove. II. 60515
28480
Hewlett-Packard Co Corporate HQ
Palo Alto, CA 94304
32997
Bourns IncTrimpoi Prod Oiv
Riverside, CA 92507
34335
Advanced Micro Devices Inc
Sunnyvale, CA 94086
66289
Sprague Electric Co
Nonh Adams, MA 01247
71785
TRW Elek Components Cinch Div
Elk Grove Village, IL 60007
72136
Electro Motive Corp Sub lEC
Willimentic.CT 06226
73138
Beckman Instruments Inc Hellpot Div
Fullterton, CA 92634
74970
Johnson E F Co
Wiseca, MN 56093
76915
Littelfuse Inc
Das Plaines. IL 60016
79727
C-W Industries
Warminster. PA 18974
8G464
Bergquist Co
Minneapolis, MN 55420
91637
Dele Electronics Inc
Columbus. NE 68601
91833
Keystone Electronics Corp
New York. NY 10012
99800
Amer Pren Ind Inc Oeleven Div
Aurora. NY 14052
6-2
Table 6-3. Replaceable Parte
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
ai
1
6»C A93iUiV» 0UT6O H6
2SNSD
OSASS-SRSOl
*ILl
QibO-OAAZ
3
CAPACIIW'EZD SlOPf T-»S SaMTK MICA
21460
0140-0362
Ut*
OlfU-0291
}i
CAPACIIOS-FAO tUF*-10S SSTOC TA
54219
19001 09X903 5 A2
OIKHOdTA
s
CAPACInU'FXQ lOUFT-lOS 20VK TA
94269
1SM1MXV020S2
*tc*
otio-oi9r
7
CAFACIIOA-FXO 2.2UFT*10S 20VK lA
94269
ISM22SX<020A2
*•(»
OttO-lTS*
9
CA3ACIT06-FA0 •220F*-10$ 39VDC lA
S62l»
ISM22AKI0SSA2
AtU*
OitlO>Ol97
CAPACItua-FKO 2.2UFF-I9S 2SVK TA
942 09
19OD225X9O20A2
Aicr
01AO-a7i>
CAFACttOI-FXO .22UF«-I0X SSVK lA
M2S*
1 90022 4X9 03 9 A2
0iM-U374
CAFACIIOA-FX0 10UF*-1QX 20T0C lA
96219
1SM1MXSO20S2
AIL9
OtSO-OI«T
CAPACIIOA-FXS 2.2UFF-10I 20TK lA
S*2S*
IS0D22SXT02M2
AUU
011^1739
CAFACIfOt-FXO *220^4-101 3SVX 7A
M2S9
1900224X90) 5A2
OISO-OSTA
CAFACITOA'FXO lOUfF-lOS 2DV0C TA
94269
IS0D10RX9S20S2
«Kll
OlW-OIEt
1
UPACIIOA-fXO 2«206 4-20S 5O4V0C C£6
26410
01SO-0I2S
«kCt*
OltO-OjTA
CAfACIIO*-PXO tOOF^-lOS 20V0C TA
54264
I50DIMX9020B2
AUtO
OIMKUat
UPACIIM-flO 107*-10l 35VOC lA
S42SP
ISOO>OSX«0)SA2
AK17
oioo*o«vt
CAPAtlfm-FXO 1UF*-1DS 39V0C lA
94269
ISOD10SX901SA2
04.U
rilf0-0««3
3
CAfACITOA-FXO 10000Fe90-10t 25VOC At
0022U
29V6StlOOO
AICI9
uiao-o^2i
1
CAFACItIM'FXO 22UFF-10X ISVOC TA
54269
19002241901362
ALL4L
OiAO-Or9t
CAFkCIIO«-FXO li2F*>10t 3SV0C TA
54269
15001 05X903 9 A2
Alta
OiaO-OA94
1
CA4AClTOft-fZO 79000f«100-10l UV04 At
26460
0160-0494
AMi
01 00-0291
CAFACirat-fXO 1UF4-10S 39VOC 7A
M2IS
1500105X903562
Aii.^4
0100-0291
CA4AC1TU6-FAD 1064-106 39V0C lA
54269
tSOOIOSXSOSSkS
Aii,^»
0100-0291
CA6ACJfOft-6XO 106^101 39VOC fA
94269
tSODI05X»SS»A2
Ait^A
0140-0190
2
CAFACirOft-FAO 20066 4-Sl 3004V0C AICA
72ISE
ON1562QlJ03006VtCA
Aiw^7
0100-0291
CAFACITDR-FXO iUFWOX SSVOC TA
94269
19001 05X9 03 5A2
Aiu^a
0100-2204
9
CAFACITCW-FXO lOOFF F<St 300UV0C MICA
26490
0140-2204
AIC^y
0100-1739
CA6 AC 1106-6X0 •22U64-106 35VDC tA
94299
1500224X903562
Altil
0100-0291
CA6ACJfU6-6XD i06«-106 35VDC 1A
M2SF
15001 05X9 03 5 A2
Atex Aa
UtSU'l73S
1
CAFACIIOX-FXO ^UF«'1IK35VOCTA
66289
1i0Q224X90aSA2
kil,3i
0140-2409
4
CAPACITUR-FXD .02UF F6B-20S 2SMVK CEH
26460
0140-2409
AiUJ9
Ol«O-O0ft2
CAFACiim-FXS SIOFF T-Sl S90HV0C MICA
26460
0160-0342
Aik.A»
0100-0291
CA6ACIT06-6XO 1J6«-10S 35V0C fA
94269
ISOOlMXSOSStS
A4l.3b
0190-0093
2
CA6AC17M-6XO .0106 »60-206 lOOaVDC C6R
26460
0150-0093
«iL}r
0140-0342
CA6ACI706-6X0 S1066 «-99 300490C. MICA
26460
0160-0342
A1L10
UlCO-USt
CAPACIIOR-FXO lUFF-lOS 3SV0C TA
96209
1500109X903 9 A2
AUA4
Ot 00-0291
CA6A;1T0A-FX0 IUF^IOX 39V0C TA
94269
1900109X903962
A1C41
0160-0196
1
CAPACITOR-FXO ISOVF t-20K 2S0WVAC CER
Tsteo
0I6O-OI9S
A1C4?
0160-0391
CAPACITOB-FXO lUf ♦-1W 38V0C TA
seres
1500105X9Q3SA2
AIC43 At
OieO-0291
CAPACITOR- 6XD igf <^-10% 36VOC TA
M200
1S00106XS03SA2
A1C44 Ac
0180-1701
CAPAaTOR-Fxe S8UF *-nK svoc ta
IM200
isooeesxooosA!
AUAi
1901-0200
4
D103E-6HR RECT lOOV 1*5A
04713
SA1644-9
AtCK^
ISOl-iUOO
0l03E-6tfR (UCT lOOV 1«9A
04713
SR1644-9
Ai4.K4
1901-0050
45
0100E-SH17CHJNO 60V 200NA 2NS DO-7
26460
1901-0090
Al&Ad
t9Cl-OV50
OIOOE-&M1TCM1NC 60V iOQHA 2N& 00-7
26460
1901-0050
AiCAb
19C1-0050
OIDJE-SMITCHINC SSV 2Q0IU 2NS 00-1
26460
1901-0090
»IMT
1902-0431
3
O(00t-2M6 1N93516 14V 96 60*96 TC«*756
04713
INSiSlS
AUH«
1901-0U29
12
01U0E-6MR RtCf 400V 790RA 30-29
26460
1901-0026
AiCKV
1901-0026
OlOOE-PiiR RECf 400V 7S0M 00-29
26460
19P 1-0026
AaLKU
1901-0090
DJ J3E-S4JTUUM0 60V 20QHA 2N$ 00-7
26460
1901-0090
AIUkI^
19G2-0049
5
DI00E-2HR A.I4V »X OO-I PO-.AH TC*».022S
26460
1902-0049
AiLKt4
1902-0124
1
0100E-2MR 2*4iV 96 00-7 P0*.4W TC«- .0736
04713
S2 lOTSt-t*
AiCHt4
1902-0431
0133£-2Nlt 1N93916 14V 96 60«94 fC«*796
0«M>
IN53516
AU«i9
19C1-U09J
OlOOE-StfJKnMG 60V 200NA 2NS DO- 7
26460
ISOI-MM
AlbHU
1902-3134
1
D103E-2NH 6.06V 5l 00-7 60«.4tf IC*».0524
04713
S2 10939-199
AiJt
12 51-3199
1
CMMECTOK 4-61N N POST TYPE
2T2M
09-*0-IMt(2*0)-MAI
AtJA
1251-4313
1
CMNECTOA 17-PIH M PObf TVPt
2T2»A
22-04-2161
AIJJ
1291-3274
E
CONNCCtOH 6-0JH M POST TYPE
2T2A*
09-SO-IMl
AU>
1291-3274
CONMECIOR 4-PJM N POST TYPE
2T2S*
OS-NCKlOAt
AiJ*
1S51-SDS>
)
CUNNELTOR-PL EUCE IS-CONI/XUK 2-ROMS
mss
252-19-30-300
Aij r
1291-4315
1
CiWRECTUH 7-PIN N POST TYPE
2T2M
22-04-2061
AtJ«
tASI'AJl*
t
CONNiClOK 19-PlN N POST 1YPL
2I2S*
22-04-2141
AKI
1
Cau-Nto INH 56 4*40 .190X.44t6 SAF*3NHl
99600
2SS0-2B
AUl
1493-0010
9
THANSJSTOK PNP $1 10-16 PO*ioON4
26460
is»'Wia
AUr
1494-0210
3
IxANSIStOR NPN 2N2222 SI U-14 PO* 900H4
04711
2N2222
AlUA
1694-Os:10
THSMSISIOR NPN XN2222 SI TJ-I« PI^SMRK
04713
2N2222
A4U4
ISS)-UU1J
IHANSISIO* PMF SI TO-IS PO»UiHW
26460
1693-0010
A|<|b
1994-0210
TRANSISTOR NPN 2H2222 SI lU-l* PO-SChMN
04711
2N2222
Aiwb
1633- OOlJ
tHANSiSrOA PW SI tO-16 PO«340H«
26460
1693-0010
Alwf
1693-0420
IS
TAA4S1ST0A PI# SI PO-JOOIU 6t«l90NKl
2S*«0
lSSS-9029
A14A
i»S}-au^4
TXANSiSTia PNP SI fO*1»<)Na FT«1S0NH2
26460
1653-0020
AlvV
1653-0020
TAANSJSTUA PNP SI PU*300Hi> 6T-190N42
26460
1653-0020
Alwii
1693-0409
6
7HANSIST0A Ph# SI DARL 70-220A4 P0-40N
26460
ISSS-OAOT
C4«ao
0160- W7
CAPACITOR-FXO .1UF •SO-IOK lOOVOC CER
26490
01603622
AA SEE
XOTE ON SCHEMATICS
A 6 $6 1 NOTE ON SCHEMATIC 10
SEE NOTE ON SCHEMATIC 10
AG SEE NOTE ON SCHEMATIC 10
6-i
Sm introduction to this section tor ordcrinc information
Table 6-3. Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
A40I4
IA53-0A09
TAANSUfM AN9 SI OAAL rO-220A6 60*40H
26410
1I5J-0409
Alois
1193-0409
TAANSlSTOft 6NP SI (NUU TO-220A6 A0-60U
21460
1053-0409
AlMiA
li»-0*09
TAANSlSrOA 664 SI OAAt 7^22066 ?0«40H
26460
1053-0409
Alois
I0&3-0409
riUMSISIOI 464 SI 0661 IO-220A0 40-406
26460
1059-0409
AluU
U9V04I9
niANSISTOA 464 SI OAIU. TO-220A6 40*406
26460
1959-0409
AlOl?
I0&3-0409
TUHSUTOB 464 Si OAAL TO-220A6 40-606
26460
1053-0409
AIOIA
1093-0409
rMNSUtOA 464 SI OAAL T0-220A6 41^406
26400
1053-0409
AlAi
0757-0290
4
1USIST04 6»19A 19 »12S6 4 tC-0*-l00
19701
PlP4C4/0-f 9-61 91-4
AU2
075I-0273
4
AiSISTOK 1*0U 19 •lllM 4 TC*0*-I00
24546
C6-1/0-T0-3OU-4
AIMS
0757-0290
USISTG6 4«I9K It «I256 4 TC-OWOO
19701
N44C1/0-TO-6191-4
AIHA
0757-0471
tESISTOA 1«0U If *1256 4 rC*0»-100
24546
C4-1/0- 70-301 1-4
AU>
0757-0491
11
usism 2K 19 .1256 4 TC«0«-iOO
24546
C6- 1/0- TO- 2 001 -4
AIAA
0757-0490
MSlSrOR 6«I9K 19 »lZ>tt 4 TC«0»-100
19101
H44CI/I-T0-6I91-4
AU7
0 7 57-0271
AISI6IOI 3.0U It .1256 4 7C«0>-I00
24546
C6- 1/9- 70-301 1-4
AUS
07 57-0490
AESISKB 4.I9A It .1256 4 rc«0«-|00
19701
A44C1/I-T0-6I91-4
AIM9
0757-0471
AASISIOK 3.01R It «U56 4 7C*0*-|00
24546
C4- 1/9-70-3011-4
AUU
07S7-OI3O
1
AESISIOR 760 It .1256 4 fC-O^-iOO
24546
C6- 1/9- TO- 751 -4
AIHI2
0757-0001
1
AtsisroA 150 It .16 4 rc*o«-ioo
19701
M47C-1/2-T0-19I-4
AIAU
0490- 44A4
1
AESIStn I9.IA It .1256 4 fC*0*-100
26546
C4-1/9-T0-1 912-4
AUIA
0 7 57-0149
3
USISTOt 22. 4R It *1256 4 K«04-100
24546
C4- 1/0- TO- 2 2 42-4
AiAlS
0757-0200
3
WS1SI» 13.3K It .1256 4 rC*0«-100
24546
C4- 1/9- TO- 1332-4
AUi«
0757-0AL9
1
USISTS 461 It .1256 4 tC-04-100
24546
C4-1/I-T0-69IR-4
AIAI7
0757-0465
1
RbSISTOt lOOA It «|256 4 rC«0*-tOO
24546
C4- 1/0- TO- 1003-4
AIAIA
0757-0149
MSI 51 « 22.4R It «I256 4 TC*0«-|00
24546
C6-1/0-T0-2262-F
AIAI9
0757-0280
MSIST04 113R It .1256 4 fC-O^lOO
24546
C4-1/9-T0-1332-4
A1k2I
0 7 57-0419
AESISrOt 411 It .1256 4 fC-O^-lOO
24546
C4-l/0-r0-601R-4
0757-0445
AESIStOR lOOA It *1256 4 7C-0A-1O0
24546
C4-1/0-T0-I003-P
AU4S
0490-44A4
AISIS7QA 19. IK It .1256 4 7C-0«-|00
24544
C6-i/0-TO-l912-f
A|k44
0757-0280
AESISTOA 13^ It .1256 4 IC-0«-l00
24546
C6-1/0-TO-1332-F
AU4S
0757-0419
Atsisrn 461 It .1256 4 fc-o*-ioo
24S46
C6-l/0-ro-60lR-4
A1K^»
0757-0445
AESISTOA lOOA It .1256 4 FC-0«-l00
24546
C4- 1 / 0- T 0- 1 001-4
A1K27
04 96-4464
AESISrOA 19.U It *1256 4 TC«0^I00
24546
C4-1/0-T0-I912-4
AlK^d
0757-0149
AESISIOI 22.46 it .1256 4 IC-O^iOO
24546
C6-l/0-r0-2262-F
AIA4V
0757-0410
t
AESIS7CA 901 IS .I2S6 4 IC-0*-IOO
24546
C6- 1/0- TO- 3 01 A- 4
AlAil
0757-0445
A2SIS1A lOOA It .1256 4 TC-OWOQ
24546
C4- I/O- TO-1 003-4
AIA3<
0757-0461
AESIS10A it IS .1256 4 7C*0»-100
24546
C4- I/O- 70-20 01 -4
AlASa
0757-0260
11
AESlSflR II IS .1256 4 fC*0^iOO
24546
C6-I/0-TO-1QDI-F
AlKi*
0757-0460
AESISTCB IK IS .1256 4 TCO*-IOO
24546
C4-1/0- TO-1 001-4
AlAiS
0757-0444
6
AESISTOl lOK IS *1256 4 7C-0«-100
24546
C4-I/0-T0-10O2-F
AiKSA
0757-0461
AESISIOA 2A It *1256 4 r&-0*-100
24546
C4- I/O- f 0-2 001-4
AIK37
0757-0411
AESISTQA 2A It .1256 4 TC-04-100
24546
C4-t/9-l0-20Ol-F
AIK30
0757-0261
AaSISTOA 2A is *1256 4 TC-0*-l00
24546
C6-1/0-TO-2901-4
A|K3V
0757-0461
KESISIV 2A IS .1256 f TC-0«-|00
24546
(4.1/6. T0-2Q01-F
AIAAO
1610- 0055
1
6Et«0AK-AES 9-P16-SJ4 .IS-PIN-SPCC
21400
1010-0055
AUAi
0757-0199
2
MSISrOA 21.SK IS .1256 4 IC«0«-100
24546
C4- 1/9- TO -2 152-4
AIKA4
0757-0199
AtSISlOA 21.5A IS *1256 4 7C«0«-100
24546
C4-1/0- 70-2 152-4
AlUhi
0 757-0471
MSIS1QA 3*0IR It .1256 4 TC-04-100
24546
C4-1/0- T0-3011-F
amaa
0757-0442
AESISlOA lOK It *1256 4 7C-04-100
24546
C 4- 1/9- 70-1 002-4
A1aA>
0496-4451
1
AESIS1QR 402 It *1256 4 IC-04-100
24546
C6-1/0-70-402R-4
Ai*tA«
0 7 57-0401
AlSISlOA 100 It .1256 4 fC-04-100
24546
C4- I/O- TO-1 01 -4
AIMA7
0 757-0146
1
NiSISlOK 14 IS .1256 4 K-0*-I00
2.4S46
C4-l/9-rO-34AO-F
AiAeo
07 57-0407
1
AfcSiSm 200 IS .1256 4 TC-0«-|00
24546
C6-1/9-TO-201-4
AIHA9
0757-U407
AESJSrC* 200 It *1256 4 TC«0*-100
24546
CVl/9-IO-20i-4
AlHSL
0 757-0429
2
AESlStOA 1.62K 16 *1256 4 IC«0»-100
24546
C4.I/9. TO-1 921-4
A|K»I
0757-0460
AlSlSICIt IK IS .1256 4 fC*9^lOO
24546
CVl/O-TO-IQOl-F
A|i(»
07 57-0429
AESISIUK 1.62K IS *1296 4 fC«OWOO
24546
C6-|/|.fO-l02i-4
AIa>*
0757-040?
AtSISIA 200 It .1256 4 TC*0«-iOO
24546
C6- 1/9- TO- 2 01-4
A|A>»
04 96-4123
1
ACSISroi 499 it *1256 4 TC*0*-100
24546
C6-1/9-T0-499A-4
AImM
0757-0«61
AESlSUil 2R it *1256 4 fC«0*-lOO
24546
C6- 1/9-70-2001-4
AIhSI
0 7 57-0461
AES1S7« 2K 11 *1256 4 K«0»-100
24S46
C6-1/0-T0-200I-F
AlH>l»
07 57-0461
AESlsm 2K it *1256 4 fC-0*-lOO
24546
C6-1/0-TO-200I-4
AlK>y
0757-0460
AESISlOA IK IS *1256 4 rC«0^100
24546
C4- I/O- TO-1 001-4
AlMbi
0757-0460
AESlSm IK IS .1256 4 TC*0*-100
24546
(4.1/6. TO-1 001-4
AiAW
0757-0460
AESISlOA IK It .1256 4 TC«0*-IOO
24546
C4-1/O-IO-10O1-4
AI«U»3
07 57-0440
1
AtSISfUR 750 it .1256 4 TC«0*-100
24546
C4-1/0-T0-751-4
AU6I
0 7 57-0260
AESISlOA IK IS .1256 4 K.-04-100
1 24546
C4-l/0-tO-l001-4
A|A6d
07S7-y«60
AISISIGR IK IS .U56 4 7C-0»-I00
1 24546
C4-l/0-T^lQ01-4
AiHOA
0757-0460
AESISIDt IK IS .1256 4 fC-O*-100
2654 5
C4-1/0-TO- 1001-4
AIKA7
0757-0460
AISISIQA IR 14 *1256 F 7C-0*-l00
24546
L4-l/0-fO-| 001-4
A1R08 Aa
0707-OU2
AESISTQA 10K 1% 125W
03292
C4-1/VTQ.1002-F
A1H99 Ae
07S7>^1
AESISTQA 100 1% 12SW 4 TC-0*-l00
03292
C4.1/S.TO-101-4
A1S1
3101-1678
1
8WrTCH-SL 7-1A-NS DIP-SLIDE -ASSY U
11237
206 Tvn
AiUI
1640-1400
2
K-OISITAL S6744.S05N TTL LS HtS 1
01295
SN74LS05N
A|J<
1620-1197
7
Jl-OICIIAL SN74LS00N TTL LS OOAO 2 NANO
01295
SNT4LS00N
AIU4
1620-1053
1
IL-0I6IIAL SN7414N TIL HEK 1
01295
SN7414N
AI«H
l62CKm4
9
K-OI&ITAL $N74tS74H 7TL LS OUAl
01295
SN74LS74N
A1^9
162^1400
IC-DIOITAL »N74LS05H ItL L$ HEX i
01295
SN74LS05N
NOTE ON SCHEMATIC 10
A% SEE NOTE ON SCHEMATIC 10
Se« Introduction to thii wctlon for ordering inforruAtion
6-4
Table 6‘3. Replaceable Parts
Reference
Designation
RPPart
Number
Qty
Description
Mfr
Code
Mfr Part Number
aiu*
6
IC-0I6ITAL nC34418 7U* QUAD
0611)
MC34416
AtOT
1920-4209
2
IC-0I6ITAL 6«741.$27N fIL IS T6i i NOft
0129S
SMT4LS2TN
Alue
1A20-U99
6
IC-0I6ITU SNI61S06N ITl IS HES 1
01295
SN26LS06N
Alwl9
lt»-lSSI
tC-OIOITAl NC)6619 TU6 9UA0
0611)
NC 34418
AiJlV
1920-U99
IC-016ITA1 SH761S06N ITL IS HEI 1
01299
SNI6LS06N
AiUU
1920-1196
26
IC-OI6lfAL &N74iS174H TIL LS HEX
01299
SN74L S174N
AiJl^
4920-45S6
IC-OIOIIAL NU4418 TU8 QUAD
0611)
HC166IP
AiJiA
1620-1201
9
IC-OI6tTAL SN74CS06H ITL L% OUAO 2 ANO
01295
SNIALSOON
AiUlA
1«»-U«T
|C-dl6ITAL SM74LSMN TIL LS QUAD 2 NAMO
01295
SNT6LS00M
AliJid
1SW-U9I
9
IC-D16MAL SM74L$0Sn ITL i$ QUAD 2 NANO
01295
SHTALSOIN
AiUiA
192^1199
IC-0I6ITAL SK74LS0M TTL LS QUAD 2 NAMO
01299
SMT4LS03N
Aiuir
1920-U99
IC-0I61IAL SM74LS03N TTL LS QUAD 2 NANO
01299
SM74LS03M
Aigu
is20-U9a
IC-0I6ITA1 SNTHSOSN tU IS BUAO 2 NANO
01295
SNTHSOSN
AIJ49
ia^U96
IC-DieiTAl SNT6I.S1T6N TTl LS HE«
01295
SHTHSIT6N
AlJlli
192^1196
IC-OIOIIAL SNT6LSI16N IK LS HEX
91299
SM7H41 74H
kUil
ll20-l»kA
6
iL-OIOtlAL SN74LS12SN TTL LS QUAD 4 8US
01299
SN74LS425H
1920-1S69
1C-0I6ITAL SN74LS12SN TIL LS QUAO 1 6US
01295
SNI6LS125N
tHW-ll9b
IC-OICIIAL SN76LS1T6N fIL LS HU
01295
SHTALSITAN
ia2a~u94
IC-OIGITAL SH74LS174N TTL LS HEX
01295
SNIHSITAN
AtJ2>
4»20-U96
IC-OIOiru SHT6LS1T6N TIL LS HEX
01295
SM7HS1 74N
AtJ2»
192^1112
1C-0I61TAL SN74LS74N TTL LS DUAL
01299
SN74LST4N
4906-0079
1
DIODE AAUT
28480
1906-0079
A4i^2»
4920-1290
8
IC-OIOtlAL SN76L$iaiN TIL LS
01295
SNT4LSISIN
AIJ2V
4020-1496
le-OISITAL SNI6LSU6N IIL LS HEX
01295
SHTALSITAN
AIJJ4;
1920-1290
IC-DI OCTAL SHT6LSiaiH ITL LS
01295
SNTHSl aiN
AlJJi
1920-1196
IC-0I6ITAL SN74LS174M TIL LS HEX
0U99
SNT4LS1 74H
AliJM
1929-Uat
1
IC-OieilAL SMT6LSS2N TTL LS QUAD 2 OR
01295
SNTALS)2N
AtJAi
4 9 20-12 1 6
7
IC-OIOITAL SNIALSDIN TTL LS )
01295
SNTALSDON
Aii^^A
4920-l»69
IC-OICITAL SNI6LS12SN IIL LS flOAO 1 BUS
01295
SNIALS129N
AiJJ>
4920-1669
iC-OI6ITAL SN74LS129N TTL LS QUAD 1 BUS
01299
SH74LS129N
Ati^M
IS 20-102
Z
1C-0I41T6L SN74LS169H TTL LS BIN
01255
SM74LS163N
AUaT
1S2D-102
SC-0T61TAL SN74LS163N TTL LS BIN
01295
SNTALSI4)N
AlgAA
1S20-120I
tC-0l6JTAL SN74L506N TIL LS QUAD 2 AND
01295
SNTALSOSN
AiU^H
1920-1199
IC-aiOIISL SMT6LS06N IIL IS HEX 1
01299
SNTALSOAN
AIJ40
482(^1412
!C-OI6liai SNT6LS76N TIL LS UOAl
01299
SN74LS74M
AiJAi
IS20-I216
SC-OIOIIXL SNT6LSt)SN TIL LS I
01299
SNTALSDSH
AIU42
19^1969
IC-OieiTXL SNT6LS12SN TTL IS OUAO 1 SUS
01295
SNTALSI25N
A1J%)
1820-1660
IC-0I61TXL $HI6LS12SN ITL LS OUAO 1 aUS
01299
SN74LS129M
AlgAA
iaiB-0199
2
IC AH9112APC IK BAN NHGS
94339
AR9112APC
Ai0«&
1616-0199
1C AN9I12APC IK AAM MHOS
34939
AH9112AK
Ai JA6
1820-4198
IC-OtQITAL SN74LS03N TTL LS QUAD 2 NAMO
01299
SNTALSOSN
AtJ^r
1S20-U0I
IC-0I61TAL SN74LS06M TTL LS QUAD 2 AMD
01299
SN76L S06N
AigAM
l920-442i
1
IC-llCITAL SM26LSI2)H IIL LS DUXL
01295
SM74LS123H
AIJ49
1920-1199
IC-OICIIAL SNI6LS06N TIL LS HEX 1
01299
SN74LS04N
A4g>U
1621^4197
IC-OtOITAL SHI6LSOON ITL LS OUAO 2 HAHO
01299
SN7US00H
*iu»l
1620-4196
1C-0I61TAL SN74LS174N TTL L$ HEX
m a
SHTALSITAN
A1J92
1920-1199
U-OICIIAL SNI6LS06N III LS HEX 1
■ id
SNTALSOAN
AlJii
1220-1206
IC-OISJTXL SNI6LS2TN ITL LS IPL ) NUR
SN74LS2 7M
Atg>%
1620-1196
ic-oieiraL shtalsitan iil ls hex
01295
SN76LS174H
Aij$>
182^1197
IC-OISITAL SN74LS00N TTL LS QUAD 2 MANO
01299
SM74L SOON
A4g>e
1620- 1a*5
2
It-DIOIIAL SNIALSDSK TIL LS OUAL 2
01299
SNTHS155N
Ato>r aa
U2O-0M7
1
(C EMCOR TTL L 8-INP
02231
93L1»>C
A40»«
1020-1196
IC-OIOITAI SM76LS174M TTL IS HEX
01299
SH74LS1 74N
Ai0»9
462>‘ll96
IC-OlCITAL SN74LS03M TTL LS QUAD 2 MANO
01295
SN74LSDJM
Ai jeo
1620-1196
K-OIQITAL SM74LS03M TTL LS QUAD 2 MANO
01299
SN74L903M
AlOAi
1620-1191
IC-DIOilAL SNIALSOON ITL LS OUAO 2 NANO
01299
SN74LS00M
AIUV2
1620-1606
1
IC-OICIIAL SMIUSASH TIL LS 6
01299
SNT4i S48M
A4J09
1820-1196
IC-OICITAL SM74LS1T4H TTL LS HEX
01299
SN74LS1T4N
AiUeA
1620- 1266
IC-IIOITAL SMTHSDSN IIL LS OUAL 2
01299
SN74CS199M
A1U»9
1620-1196
IC-OICIIAL SN74LS1T4M lU LS HEX
01295
SNTHSl TAN
AiJeo
4620-1196
U-OiOIIAL SN76LS1T6H IIL LS HEX
01299
SN74LS174N
Atue?
1620-1196
IC-OtCtTAL SN74LS174N TTL LS HEX
01299
SNTHSl TAN
Aiu»a
1620-1196
IC-DICIIAL SN74LS174N TTL L$ HEX
01295
SNTHSl TAN
4ioe9
1820-1196
JC-OICITAL SN7HS474M ITL LS HEX
01295
SNTHSl TAN
A407U
1820-1196
IC-OICiraL SHIHSCIAN IIL LS HEX
01299
SNTHSl TAN
Aign
1620-1760
1
ic-ouiiAL usaaasN nos* osn. orvr
21014
DS6063M
AUl
JAi<>igoi
1
CHTSIALi OUARIl U HH2
28480
0410-1001
1200-0489
1
SUCKETIIC 14-eiN K NUUNriNC
28480
1200-0419
1200-06 7)
2
SUCXEI-IC lA-LONT OIP-SIOR
26480
1200-0473
gi« 0 - 0»86
Z
•6US S6R-Ra2)
00000
060
03 60-0»67
9
•88S 6AR-H626
00000
Q8D
9040-047U
2
CUlOElKUC-lN RC BOARD
26400
9040-0170
&A S£E NOTE ON SCHEMATIC 10
See Introduction to this teetion lor ordering Information
Table 6-3. Replaceable Parts
Reference
Designation
HP Part
Number
Oty
Description
Mfr
Code
Mfr Part Number
0345^66502
1
K aS$EnH.9> DISE1.8T
2046O
03495-64502
S.ICK1
I95O-0547
36
U0-VI$l4At AUII-lMT«2flC0 |f«20HA-HAl
26410
1990- 0S4I
1940-0S4I
UO-VISIBLC tUR-INf*MCO tf«20HA-RA4
26460
199>-0S*2
L990*0547
AAO-VISUIA UIN-INT-2«tCl> l^a20MA-NAX
26460
199O-0S*r
499^0547
U0-VISI8LI UIN-IMr-JMCD iF-2aita-HAa
26410
1990-0547
499i>-0547
ua-vissaiE wat-tNr-2ncD if-zoMs-NAs
26460
1990-0547
A^CMA
1«90-0»*T
U0-VlSI6i€ LUN-l«4f*2nCO JF*20fU-4UX
26460
1990-0S*r
AMt
4990-0547
U»-VIS1SLE UIN-INI«2MC0 IF-20M-NAX
26460
1990-0547
A2CAH
1990-0547
U0-VISIU6 LOI^iNT«2ACO |F*20HA-HAX
26410
1990-aS*T
A^bRt
t««o-os*f
U0-VIS16Le LUM-1NT»2NC0 IF*20M-HAX
28*80
1990-0547
A^CHi^
ISfO-OSST
U0-VISIM.6 UJPl-CNT*2nC0 1F»20HA-RAX
26460
1990-0S*?
A^LHit
1990- OMT
LED-VI&IM.E tUH-IHT*2NC0 IF>20M-IUS
28*80
1990-0567
1990-0547
ua-VISIM.E LUH-INT«2NC0 IF-20M-NAX
26460
1990-0541
A2CHU
1990-OMr
UO-V]$]6t6 Ul»-lMr«2MCl> IP«20HA-NAX
26460
1990-0S*r
A^LKIA
499^0547
l69-VlSm£ lUH-JMr-2HCO |f»20MA-HAA
26463
I990-0S*}
4990-054 7
LE0-VI514LC Um-|Mr-2MC0 1P-20HA-MAX
26460
1990- 0S*T
A^CKU
1990-09*1
U0-VISI6(.e LOR-INf«2ACO IF-20PU-AAX
26460
1990-0547
A^VAlf
4990-0547
IED-VIS18LE Um-IHI*2NCa tf«20M-NAX
26460
1990-0547
AiloAlR
1990-0547
L60-Vism€ UPf^lNT*2HC0 1F-20HJ^HAX
26460
1990-0567
A^bKl9
4990-0547
Lt»*VISIM.E IUH-INI«2IIC0 iF«29H*-HXX
28*18
1990-0947
A^bRkt)
1990-0S4T
LE0-VI5I6LI LUFI-INT»2nC0 iF«20NA-IUl
26460
199Q-Q567
A^btui
1990- 0>*>
Lt»-VISI8LE IUI^IHT*8IIC0 IF-20U-HSX
26460
1990-0567
4^h.K«A
499U-U547
UO-VISIM.E tun-INT*2HC0 IF-2IMA-NSX
26460
1990-0547
A2UH^J
I99U-099T
UO-VlSaOLE LUP5-1NT*2NC0 |F«2QHA-HAX
26410
I99O-0S4T
A«wH^A
4990-0547
LE0-V4$I6LC tUH-lNt*2MC0 IP-20IU-RAA
21460
I990*OS*T
A^blxS
4990-0547
LEa-VISIBLC U>H-INT*2nC0 IF-20RA-HAX
26460
l990*0S*r
A2C«U^
1990- 0S*f
Ufr-VlSltL6 iUH-UT«2nC0 IF«20PIA-HA|
26460
1990-0567
A^.iur
4990-0547
U0-VISI8LE LUN-INT*2RC0 IF-20U>NAX
28*80
1990-0567
A^bA^A
1990-0547
U9-VJ$aiLE LUPt-INf«2MCD 4F*20HA-MAX
26460
1990-0S*r
A^bM24
1990-0547
IE0-V4$lt46 tUH-lNT»2MC0 tf«20MA-RAX
26460
199O-0S4F
A^bMiU
1990-0547
LES'VISIKE um-SNT>2nCD IF-20IU-IUX
26460
1990-0547
A^CK^i
1990-0>*7
AEO-VIS46I.E UJI»-lHf*2HC0 ]f«20HA-RAX
26460
1990-0967
A^»
4990-0547
L6&-Vl$lM.e I0n-JNT*2HCD tF-20«A-RAX
28*80
1990-0547
A^HJl
1990-0547
UO-VIS44LC LUN-SNf«2nCa lf*20llA-HAX
26460
1990-0S*?
A^bAiA
1990-0>47
U0-VlSiac( LOH-lHr«2Ma) IF«20HA-HAX
26463
I99>-0S*?
4^bAi9
1990-0547
U9-VISIBLE Iun-1NT-2HC0 1F-20HS-MAX
26460
1990*0841
4990-05A9
0l5fLA7-MUH 5£0 •5-CMAft «400-H
264 60
1990-0539
A^JiA^
49SO-0540
01 SAL AY- HAN SCO 1-CHAA *45-H
28*80
1990-0540
A^JoHA
1990-0540
OISFLAT-NOM SCO 4-CMAA .4J-H
26460
1990-0540
A^O^A
4990*0540
Di$?LAY-MUN SEC i-CHAA .Ay-H
28460
1990-0560
A20^H9
4 9 90-0540
OISPLAV-NUN SEC 4-CHAA .Al-H
26466
1990-0960
A2i>»N4.DSAA6
4990-0540
9IS9LA7-NUH SEC 1-CMM »4>-H
26460
1990-08*0
A^l
NO FART NUWOER.'SEE A2WI
A2n
12SI-4340
CONNECTOR t6-PiN f POST TYPE
am*
23-01 2161
IKI -}*?«
CONTACT-CONN UANt POST TYPE FEH CRP (P/0 P2I
2S4S0
1351-3476
A4<1
J6 Ai-2045
atsisrext 20g S« .2Sa FC TC— *ao/*8»
01121
C62015
A4n2
06 5^2^15
XESISIOa 220 SS .25K FC TC*-*00/*600
01121
C62219
A{H$
04 03-2^45
XESISTOa 220 SI FC TC— *«0/*«00
01121
C8221S
04K5-3j25
XESisroa a si .2Sii fc rc— *oo/*soo
OU2t
C6J509
A^K9
o*a}-ssos
XESISIOI )S SI .2S8 FC TC*-*00/*500
0U21
CB830S
A^K«
0oA>-3JJ9
atSiStOM 8} SI .2SU FC tC--*DO/*SOO
01t2t
C63105
A^h7
04U-3M5
XESISIOK 83 SI .2S8 FC TC— *00/*SO0
01121
C6S309
A^«lt
gbs>-Jsos
XESiSfO* 88 SI .2S« FC IC—*«0/*SO0
01121
C8180S
AtfRV
06IU-3905
RLSISIQR 33 5S *254 FC fC«-400/«500
0U21
CB880S
AlmlU
a»*s-SMS
R«SUTOR 33 SC *25N FC TC«-400/»500
0U21
C8830S
aAu
06SA-3A05
XtSiSIOM 88 SI .2SS FC TC— *00/*S00
01121
C88IOS
A^KU
l81l>-02;9
Nttsuax-OES *-PIM*SIP .l-PIM-SPCC
1128*
790-61-R330
A^KiA
18l0-0»*
NETMORR-RES 6-PlN-SIF •4-FIN-SPCO
1128*
TSO-81-X880
A^Alb
I»l0-0<j9
NAT40AR-RES I-FIN*SIF •1-FIN-SPCC
U23A
TS0-8I-X880
AiKl>
14 4^0229
Mtr40KR-IE5 6-PlN-SIP .4-PIN-SK6
11236
750-61-1030
Aa«U
1810- 0<29
M4T40RK-RES 0-PIN-S4F *4-FIN-SFCC
U236
Tso-ai-ano
A^«lf Aa
4410-0706
2
N<r60RR-RES i-PlII^SAF *I*FIN-SPCC
03483
7EO-81-R10K
A2A|« Aa
ltlU-0208
NEfROKR-RES O-FlN-Sir .l-Flf^>SK«
02483
7SO-81-RIOK
acst-soa
506O-94J4
n
puSrteofroN smitch
28*80
80*0-9*3*
A^«|
•420-2254
1
*U8ie 8SSEIIM.9a OISPLATIINCLUDES PH
26410
8120- 228*
A^«^
05455-64604
1
CAALE ASSkROUe KtYBOAHOONCLODES F2)
26460
03455-6I601
I 20 »-o*r*
•
SJCXEI-IC tb-CONI 01P-8CDR
26460
1200-0676
&« S6€ NOTE ON SCHEMATIC 10 Introduction to this section for orderioc Information
Table 6-3. Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
Ji4$V6A>03
1
AbC* ASSEMtflV, SAOCLSSOA
29A90
09*99-6890}
034BS-8tS03
REBUILT EXCHANGE ASSEMBLY
26400
03499-88903
AXi
OLAO-0.<10
y
CAMCIIOK-FIO 1.3UF6-20I I9V0C lA
9629*
1500315X001 5A2
0L«0-a^LU
CAPAU IOR-F«l> 3.3UF4-40S I99X lA
56289
15003 J5XOQISA2
Aaci
>)l«e-04ld
CAPACIIOR-FXO 3.3UF*-20( I9V0C tA
S62B7
LSO0335XO0I 5A2
AiAl. HI
Acbisrut 2K 14 .USH r rC*Ue*LOU
246*6
C4«1/8*T0'200L*F
A3Ki*
MOOING LIST
ofm-ilii
A
RlSUIdi 6.6U IS .149M f rC-OF-lOOIS.OVI
24646
C4-I/8-Y0-464L-F
OAM-AIAI
1
RE9UIUK 2.67k is .1496 F rC*0»-100l4.»V)
24646
C*-178-TO-287l-F
JAVe-OUAi
1
RESmUR I.96K IS .1496 F IC-OF-100I4.0VI
24646
C6-l/a-T0-l*61-F
•ih AA2A
1
AtSUfUA I.A7K U •L2)M f fC*0*-|0«3.6VI
24646
C4-l/l*rO*ll71-F
U?S7-IIa«0
HL9I9IUR IK U .1496 F IC*0*-100 I3.0VI
24646
C4-I/8-TD-1001-F
()6W-A70U
i
RESiSTn 719 14 .1296 F IC-0»-100(3.6VI
24646
C*-l/8-tO-7l9R-F
U7S7*04IA
1
RtllSIW 911 14 .1496 F IL«U>- lOOQ.OVI
24944
C4*1F8-Y0<'5UA*F
AiJi
Lb20-i2Ui
IL-OIOIIAl 9N7M.S06N TU LS UUAO 2 ANU
01199
SNT41S0BN
AiOc
L«20-UUL
It-OlbllAl SN74LS09N tU AS OOAO 2 AND
01299
&N74L&08N
LttZO-UVA
U-OieilAA S676LS01M 7U AS QUAD 2 NANO
01299
S67*IS03N
• AJA
LA20«ii99
IC-OICirAl 9N7HS06N III tS MEK 1
01299
SNT41S0*N
AiU9
t«20-U9>
1
IC-OlCtlAL SH76AS179N TIL IS UUAO
01295
SN74LS175N
A9ue
LAiA«02AA
1
«K» AOH-MOS
29490
1919-0246
AAUr
leL6^02»>
1
•IC> MOH-MUS
28400
1919-0245
Ajja
L«l«-U2oA
1
eJCe HOMOS
29480
1919-0244
AAU9
1840-14.91
4
IL-OICITAL Md>
28480
1920-1494
A040-0/AA
A
SlIHACrUH^PC 90 BU ^U.TC «0«2*eO*rHltNS
29480
4040-0749
ALU
0J*S>-eSS10
1
r.C* *SS€ULT» INOO Hb
29490
03455-44510
AiuCl
0160-4479
1
CAFACnOR-FXO 220FF »-10%
2S480
0160-4479
AiJC^
0460-2497
A
CAP4CiruA-F40 iOPf e*>9 >OOaVI>C CCA
28480
0140-2257
AluC)
UL«0-AAb»
A
CAPftCirOA-flO iOOPf »>104 lOOOHVM CCR
29490
0140-1444
Ac
0440-0199
2
CAAaCir0A-F40 6600AF LOS 20i> VOC POLVE
28460
0190-0199
AiUCS
OLAU-ULAA
1
CAP4CirOR-FXD 220PP *“9g A009VK NJCA
29490
0140-01 34
ALUbO
0190-0071
2
CAFAtlfOA-PXO 400PP ^Sl L300tfVOC CCA
29490
0190-0071
Atdl.7
0|9(K0u71
CAPACItOA-PXO 40UPP *~6t lUOOMVOC CCA
29499
0150-0071
Aiuca
QlM-iUm
u
CAFaCirOA-PAD iUP«-204 $OVOC fA
5A280
15001 05 X00S0A2
ALUcS
0190' 02AU
CAPACUOA-fXO 1UF4-20S >OVOC TA
66269
1900109X0090*2
AldbU
OlAO-0229
A
CAPACifUA'-PxO yyUF^lQt lOVOC 7*
66269
1500134X901062
AluUtf
04110-0147
2
CAPACltUA'PXO lilP W04 2MV0C CCA
29490
0140-0127
ALUCiA
OlAO-l^A
AAFACI lOa-FXO lOOPF F-IOS lOOOaVOC CER
29490
0140-1444
AIJAi*
Oil^AAAA
CAPACJTOA-FaO lOOPP «-|JS lOOOHVDC CCA
29490
0140-1444
A10U9
01«0'2AU6
2
CAPACIIUR-FKO 27PF *-9t 10U6V0C MICA
29490
0140-2104
AlUUU
OlAO-0209
1
CAPACUOA'fXO A7PF 500HVOC HtCA
721J9
0M15947020500lfVlCA
AlUCIf
0i«4^220A
CAAXCLTOA’PXO iOOPP iaOHViX MICA
28490
0140-2204
ALUbLft
OL«*^O^iO
CAPACIfOA^MO IUPW09 90V0C 7 A
9628*
I900I09K0090A2
ALUUL9
OlA^O^JO
CAPACITUR-FXO IUFP-20S 90VOC lA
9628*
1900109X0090A2
ALUL2L
UlAO-4441
1
CAPACIfOA’PXO iSOAf e-2«5S i6UHm P<M.VP
29490
0140-4441
0140-4497
CAPACJfQA-fXD lOPP ^54 9J04VOC CCA
28490
014>2257
AluUA
OIALHOISA
CAPACITUA’PXO 2200AF »«104 200HV0C POIVC
54299
292P22292
ALUW^A
0160-2106
CAPACiroft-fXO 27PF «-94 3iM»V0C MICA
29490
0140-2106
ALUC^>
ui eo-oi9s
1
CAPACIlOH-PXi> .i3Ufe-20S 3SV0C fA
542 69
1500314X003 5 A2
AlUL^A
uLAo-^eAr
i
CAPACIIUR-FKO .OIUF AlOO-US 906V0C CER
28*80
0140- 1847
*tUL2/
Ul«0-39Ar
CAPACI7UR-FK0 .OIUF MOO-OS 906VUC CER
29490
0140-3847
ALUb^a
01«l>-01l6
CAPACnaA-fXD |OUP*-t04 2uroc fA
54299
1500104X902082
ALUCiV
OUpO*2U*»>
16
CAFACIIOR-FXD .OIUF F80-20S I006VOC CER
28*80
0160-2055
AiJLAL
Oi«0*2U»
CAFKCIIOA-FXO .OIUF P80-20S IdOOVUC CER
28*80
0140-2055
AIJLA^
OLiMKiWAU
CAPACI70A-fX0 iUFe*204 >OVOC 7A
9628*
19UD109X0090A2
ALuCiA
UioO-3e47
CAPACJfOA-PXO •UtUf »10U*U2 6<ftt¥0C CCA
29410
0140-3847
ALAtiS
J 160-0^ At)
CAPAClfQK*FXO lUF»*20t 90V0C fA
54299
1900109XOD93A2
ALUUA
01«U-2v^»
CAPACI lUK-FXD .OIUF *S^2US lOOaVOC CER
28480
0I8D-2999
ALUUaA
i)4M>-2U»3
C4P4UfUA'PX0 *OIUP »aO*2a4 lOOHPOC CCA
28490
0140-2055
ALUVJ7
0160-2099
CAPACnUA-PXD .OIUF »9J>2U4 LOOHVOC CEA
21410
0140-2055
Aiuu>a
C4PACnOA*rXO -Oii» HIO- 20 S toouvoc cca
28*80
0160-2099
ALUbAA
ULAU-2USb
CAPACI TQA-PXtl ,aUtf »eO-204 lOOirVDC CEl
28*80
0140-2055
ALOCAL
Ulu>-2V5»
CAPACItUA-FXO *0109 ♦iU-2U4 lOOMVOC CEA
29490
0140-2055
ALUwA^
0160- 2U99
CAPACI tOA-PXO •UiUF •90>204 lOiMVOC CEA
20460
0140-2055
UL«A«2g9>
CAPACI lOR-FAD .OIUF 69U-2U4 1006VOC CER
28*80
0140-2055
ALUwAA
dL«U-iA»9
CAPACJ70A*FX0 lOOPF P-IQA lOOOHVOC CCA
28480
0160-9*66
ALAbAS
0L«U-02i0
CAPACIIOA-FIO 1UF»>204 90¥M fA
5428P
15001 05X005 0A2
AlUVAo
UL9&*0229
CAPACIIOR-FXO 11UF4-I0S lOYK lA
9628*
1500334X901082
AlUAA/
J14IK2U93
CAPACI lOH-^FXO •OiUF »«0-2g4 IU0«V0C CCA
28*80
0160-2999
AiVbAa
UlM-«UdS
CAPACIfUA-FXD «OiUF ♦•U'AOA luOHtfUC CCA
28490
0140-2055
AlJtAU
a 1
CAPACI lOA-FXD .OIUF *90-204 iOUkVOC CCA
20490
0140-2055
AC SERIAL NUMBERS
] 622AOI 906 AN 0 ABO V
1
1 WiM
1
ES 01900199
Se« Introduction to this section (or ordering Information
6-1
Table 6-3. Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
C*r«ciiua-f<o .oiuF •to-2ui loohiroc cto
20A0O
0100-2055
g|«^2At>s
ClVACItUK-FjlD .02ur •«0-20( 2SHV01 (fil
28*80
0160*2605
AiOOJ
CA0AC1TU0-FXO .D20f A0O-2OI 29HV0C CEA
28*80
0160-2605
jtao-o/eo
CAPACIfU0-FAO 1UFA-20C 50V0C TA
»*289
1500105XOD53A2
AI0b3»
CAPAClfUA-FXO lUF A-20I 2So90c CEi
2OA0O
0180-0122
AUU>»
oia>-i>d.AO
CAFACITO0-fXO lUF*-20f 50V0C lA
98289
I500105I0050A2
Aigu>/
0llAH2»2A
2
CAFAClfOA-FXO 220 UFa 50-I0X 50V0C Al
20A0O
0180-2828
CAFACJfOA-FXO 220uF»5O-l0* 50V0C AL
20A09
0100-2620
A1
omo-tuiu
CAeACIIW-FXD 1UFA-20X »0«OC lA
56209
15001 05 X0050A2
Aigg(»i
gl«0-UA91
CAPACIIQA-FXO tOOOUF«9l>-ia« fbVIK AL
0022D
25V8SUOOO
klM4
CAMC11O0-FXO 10000FA50-104 25V0C AL
00229
25V05L1OOO
AIUU6J
iJ
CAAACIfOA-FXU 1UF*-2O0 SOVOC lA
5620}
1500 105X005042
AlOLAb
giA0-9AV»
1
OAAACIIOA-FXO 92OOUFLI0O-IOI I2VIK AL
20A0O
0100-0695
AiOLAA
04*^1)23^
LAFACnuA-FXO 1OF»-2O0 50V0L TA
98288
15001 05 X0050A2
• ijua
I9 0i*0>$6
0
UiUJE-ttlN FA* M)V 29NA 10-22
20A0O
1901-0988
AigLM^
iVgl«0»AA
OlOie-OtN Fxr MV 2»HA TO-22
20A0O
(901-0988
AidO(>
i90J*Al«IA
2
DIQ06-2MA 5«02V 5< 00*7 F»««AO rC«*.0U«
15111
CO 3565A
AigLAA
19C4-0I>»U
OlOOf-WirCHINO IDV 2UiMU 2NL 00-2
28*80
1901-0050
A1JC4>
DI09E-5MjlC«ilfW 00V 200**A 4H% 00-T
20A0O
1901-0050
AiUleAA
i9gi*oa>9
Oluae-MlITCHillO ISV 200HA 2H$ 00-2
20A0O
1901-0050
eiJkfcf
19O2-0UA
»
DI30E-2NR lt>.2V «X 00-2 TO'. AM rC-*>0Mt
OA713
S2 10939-2*2
AiJtAA
lAoi-oavg
OI950-3H1TU41W 00V 200MA 2A5 00*7
20A0O
1901-0050
AIjCh^
ItiU-uie*
0C0DE-2NA 16»2V 50 DO-7 PO««AM 7C*»«0AAI
0*2W
$2 10919-2*2
AlJLMii
l9C2-0i«A
OI30E-2NR 1A.2V 9X 00-2 F0*.*M TCx.OM*
0A7U
S2 (0939-2*2
tsai-ousd
DI93E-5VlfCHlMC 00V 20DAA 2MS 00*7
20400
1901-0050
AigCxi>
19 01*0090
OlOOE-SVlTCNlM 00V 200MA 2H& 00*7
20AOO
1901-0050
AiUbKlA
1902*3002
1
OiOOE-MR 2.J2V 9t 00-2 PO>.Ail IC«-.OT*T
15010
IB 39928
AIggAlS
49U^-0gA9
D10DE-2MA 6.19V 50 00-7 n>*«AM TC«*.022I
20A0O
1902-0049
AWvKiJ
190i*0g93
UiaOE-WIICnlMC *0V 200HA 2H$ 00-2
20A0O
1901-0050
AIUCH17
1901*0030
D10JE-SMIICHIM6 MOV 2U0MA 2Ni 00-7
20A0O
1901-0090
A4JC«it
1901-030A
DiOOE-MN FAt MV 2»XA 10-22
20A0O
1901-9988
AlsrCAiV
190l*ObOA
OlODi-CAN PRf 30V 25MA T|>*72
20A0O
1901-0506
AIOU^I
19Ci*O90»
OlOOC-WN PRP AJV 25HA 11^72
20A0O
1901-0506
AtJUt^^
19 01-09 A6
0ia06-0€N PKP 30V 25«U 70-72
20A0Q
1901-0506
AMKii
i90i*oo>g
DIOOE-MITCHINC 80V 200NA 2NS 00-1
20A0O
1901*0050
l9U*0v3O
OiaSE-SHITCHlNO 80V 200AA 2NS S&-2
20400
1901-0050
Ai^CH^»
19 Cl *0050
OIOOC-0W1TCM1NO 00V 200MA 2N& 00*7
20A0O
1901-0050
AlJCh£^
19Ql-0QSa
Oiooe-SHIICMIMC BOV 20JNA 2NS 00-7
20A0O
1901-0050
A1JLM^7
i4a-03r&
A
OlOOE-WN FKF 3>V MMA 00-2
20400
1901-0128
A|gU2A
1901* Oi/A
OUUE-CAN PRP 35V 50HA 00-7
20A0O
1901-03 76
AiJbA^y
1902-OiAA
OIGDE-ZNA 16.2V 50 UO-7 PO-.AP rC»».O660
0*713
S2 10939-242
AiJ«pA>i
19Q2-01AA
OIUOE-2MR 1A.2V SX 00-2 FO<.*M 7C«F.0AAX
OA713
92 10939-2*2
AWU(i<
1901-0050
DIOJE-SMIICHMS 89V 200HA 2N1 00-2
20A09
1901*0050
AlULAii
1901*0090
UiOjE-SMITCHINO BOV 200HA 2N» 00-2
20A0O
1901-0050
AlULAM
I90i-oa»o
OIOUE-5U2TCH1MC 0UV 200MA 2NS 00*7
26400
1901-0050
AlOLAiS
1901*0050
01DDF-5HltCHIN6 00V 200AA 2NS 00-7
20A0O
190 1-00 50
A&0CNi9
i«ci-oo»g
UIME-SHIICHIMS 80V 209MA 2NS 00-2
20A0O
1901-0050
aiulaa/
1901*0050
OlUoe-SHlICNiW BOV 2U9I1A 2H$ 00-2
20A60
1901-0050
AlOCHiA
19gi*0U50
OIOJE-WIICHINO 8UV 200HA 2N» 00-2
20400
1901-0050
AiOCHiV
i9Ci-ow»a
l>IUOE-SMITCHi>(C BOV 20UHA 2NE DO-2
20400
1901-0090
AlUCHAi
1901-0053
UIOOE-SHITOHINC 89V 20URA 2NS 00-7
20400
1901-O0M
AIUCAA^
1901*0090
OlDDE-SWIfCHlNb lOV 2O0NA 2K5 00-7
20400
1901-0050
AlaAAAJ
t4Gl-IM>0
01 DDF -SWITCH tM6 0DV 2DDMA 2N5 00*7
20A0O
1901-0050
AUChAA
1901-0050
0i09E-SHiICMlN9 BOV 203NA 2NS OU-7
28*80
1901-0050
AldUAA
1901*0050
OIDOE-SaiTCHWC BOV 2U0AA 2N& 00-2
20400
1901-0090
AIvAKAa
1901*0u5O
DiOOC-$MirCMIN6 BUV 209HA 2NL 00-2
20A0O
1901-0050
AiatAAf
1901-OU50
tflODF-SWlfLHINC 00V 209IU 2Mb 00*7
28*80
1901-0050
AiJCKAA
1901-0020
UIOOE-FMA AlCr AOOV 2VDMA 90-29
20400
1901-0020
AUCAAA
19 01-0020
OIOD€*PHA HECr AOOV 750HA DO-V9
20A0O
1901-0028
AigCH>i
1901-0OGI
DIUOE-MA AlLt AOOV 75DHA 00*29
20A0O
1901-0021
AiaLR)^
19CI-OU20
UIUOE-FMR ALCI AOdV 2iOHA 90-29
20A0O
1901-0028
A|gCH9>
19U-OO20
D1O3E-9H0 RACr AOOV 750*16 00-29
2IA0O
1901-0020
A14UAA
1901-0020
Oigol-PWR AECr AOOV 750MA 00-29
20A0O
1901-0020
AlgCH9»
1901-0020
OIQOF-PHA AEC1 AOOV 75DHA 00-29
28*80
1901-0020
AAUUH9A
1901-0020
OlOOE-PMI AECI AOOV 750MA 00-29
20A0O
1901*0020
ilOlioI
19C1-OW20
OlOOE-PMA lECT AOOV 750HA 00*29
20A0O
1901*0020
A|gCH>»
1901-0020
OIDOE-PWA UCT AOOV 750MA 01^29
20A0O
190 1-0020
AlilAH>y
1901-UO50
UI00C-5Wl7CHtf«6 00V 200HA 2H& 00*7
20A0O
1901-0050
AUChoi
1902-00A9
0I02F-2MA A.19V 50 00-7 PO«.AW TC«*.O220
28*80
1902-0049
Ait|«.KW
1901-0200
OlOOE-FHR AECT lOOV 1.5A
OA713
SA10A6-9
AWCkbA
1901*0200
OJQOE-PHA HlCr lOOV I.5A
0470
5X1046-9
AlJtAoA
1902-01 f6
2
9139E-2MA 92.8V 8t OU-lt FU*1H IC*F.0*1X
0*2t»
92-11213-119
AlJAAO»
1902-UVA9
UID3E-UA 8 . 19V ii 00-2 F9>.L> IC<*.022X
20A9O
1902-0049
AigtnAA
19C2-0W9
OI93E-2NA «7.»V ix 00-19 FO'lM lf*.08>L
3A713
52*1121 3*315
See inlrcxluctlon to Ihit tecllon for orderlnc tnformAtlon
Table 6-3. Replaceable Parts
Reference
Designetion
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
atjuiu/
4902*31M
0I036-2N8 ».*2V 8S 00-7 PU-.*4 IC-«.01*Z
1861)
CO 55454
AiUWMott
1902-
0t936-2N9 1M55519 14V 59 90-5H 7C«475I
04715
1N55519
AlOWKO'*
|9 04-0u>0
OIOD6-SwUCAiMo 60V 200NA 2MS 00-7
26460
1901-0050
A10CR7). 72 A
1901-0060
DIOO€-$WITCMINO 6DV 200WA 2NS 00-7
29480
1901-0060
atjai
49 70-0077
1
•30686 V 97Cf9
29490
1470-0077
• t tO-OuS2
1
9146-96* 2«4-OHM/7f •01-UlA
26460
0110-0052
aijji
1^SI-20]S
CUHN6C10A-K iOCE 15-CUHI/KM 2-90HS
71768
242-14-30-330
aijj.;
I2>i-2W3
CUNNECTOR-PC EU6E 18-CUN1/4UM 2-RQSS
71795
252-15-90-500
AiaJi
1»I-«IB6
1
kUNN6U08-PC EDGE 16-CONT/ROW 2 ROWS
AIJJA
12SI-9S2S
1
C0VH6CT08 10-91N H 90*1 TV96
2646)
1251-4925
i25i-3iy<
1
ClMN6l.rOA 5-91 A N 9061 rV96
27244
09-60-1 05112405-0)41
AiJilt
0490-0740
1
AeiAYS9660
29460
0*9tK07*0
09M-OMI
11
9UAV-9660 lA lOOAA lOOOVOC 5VOC-COIL
26460
049^ 0465
AlJAi
0490-044)
9kiAV-fl6IO lA lOOMA lOOOVOC 5V0C-C0U
26460
049> 0665
AiUltA
0490- 0»AA
4
ftaar-REEO i* iooha ssovoc 8voc-wii
29490
0*40-0***
0490- 0i*6)
6EL4T-R6E0 14 luOU 100040C 8V0C*C0ll
26410
0490- 066)
4|J«»
0490-064)
A6LAr-U60 lA lOOHA 1000V04 5VDC-C0U
26*60
o*4a-Ok*3
aiwKf
04 9O-U664
R1L4T-AEE0 14 100H8 280V0C 8VOC-COU
26*60
0490-0464
A4UK*
0490-0664
AUAT-I(f60 lA lOOHA 250V0C 5V0C-C0K
29490
0490-0664
A&OKV
0490-0664
RUAV-A660 lA lOONA 250V0C 5VOC-COIL
20490
0460-0664
atuLi
91CO-1641
i
cull-nto 2*0UH 86 e-48 .18808.37816
2*22*
18/2*3
A10P1
I76i-a}ii
1
CONNECTOR 6-9IN F 90ST TV96
27264
23-01 2061
1261-3476
CONTACT^NN g/W POST type few cap (9/0 911
28460
I261-M76
AI0P3
1261-4310
1
CONNECTOR 2-9IN F 90^ TYPE
27294
22-01- 1021
AiOyi
»0(B-7028
4
fAAN*ISC08» ffel
29490
8066-7026
AiWM
6044-7029
tHANSUtORf F6T
29490
5069-7029
A1JU3
SOei-7047
9
148N$ISiat. FEI KOVAR87 83008
29490
6061-70A7
AiJw*
8061-7047
THAASISrOR* 967 AOVAR^F 55005
26490
6081-70*7
aiuo»
16)9-0309
1
TR8II8IS70R-JFEI DUAL N-CHAN O-NOOE 81
29490
1655-0509
AidOb
19)V0447
5
fRAASlSrOft-JEET DUAL N-CHAN 0-N0U6 fO-71
29490
1955-0247
Aiug?
lasvoon
15
IRANSlSTQR N9N $1 9(^)00NM F7«200NH2
29490
1954-0071
AiOUtf
U))-0O86
1
iKAHSISrOR PW SI PI^aiUHH F7>40nH2
29490
1953-0096
Aijy«
lasi-oiMo
7klNSlSrOR Pl^ SI PO>3»OH« F7«l>ONH2
29490
1959-0020
AAggii
19)4-0071
iRANSlSrOR NPN SI 90-)00HH Fr*200NH2
29490
168*-007l
AiUvi^
1994-0097
5
IRtaSiStOa NPN 81 PD>3Mna FI-78HH2
29490
1954-0097
AlUwl>
30 99-7029
TRANSJSTORa F6f
29490
5096-7029
AijgiA
S09B-702H
rHANSISrORf F£T
29490
8066-1026
Aijgi>
6061-7047
IIUNSUfOR* FEt KOVARSF 55005
26460
8061-70*7
AiOUiA
6061-7047
fRANSiSlOR. 961 KOVAR*f 55005
29460
5061-70*7
Aiguil
18M-0<t6
2
rKANSiSfOR-J96f DUAL N-CHAN 0-NU06 TO- 71
264 60
1688-02**
A1JUI9
6061-7047
TRANS ISrORt FET KOVAASF 55005
29460
5061-70*7
Aiggi4
5061-7047
IRANS1S70R* F61 ROVARSF 53005
26460
5061-70*7
Aijg^i
6081-70A7
l4A*8l8iaR. FE7 80VAA8F 83008
26460
5061-70A7
AiOl^tf
1656-0420
11
Ta4N8l8IQR 2-FEI 2N*3»1 H-CH4H D-MWE
04713
2N*34I
AiOg^A
1954-0097
Transistor npn si po«)4oiw ft«75nh2
26460
1954-0097
AiJgSA
ld$4*0071
TRANSISTOR NPN ST PD«500M FT«200HN2
26460
1954-0071
atuiMs
lttM-0071
TiUiN8l8iaR NPN 81 PO-300IW FI-200HtU
26*80
1954-0071
Aiggi*
19f)-0020
TKANSISIOR 9N9 SI POa^OORM 9T-150NM2
26460
1953-0020
aivuil
19S5-0J69
6
IAANSI*T0R J-96T AUCHAN 0-M006 TO-72 *J
26460
1688-03*6
Aiug^A
1955-0)69
7<4M8I8U« 3-FE7 N-EK4N D-NJOE 10-72 81
26460
1955-0)69
A40gtc«
19 55-0)49
7RtN818ItlR J-FET N-CHAN O-NOOE 10-72 81
26*60
1955-0)69
Aiggii
1955-0244
2
•TRANSISTOR* JF67 N-CHANN6L 2N4657
26460
1655-0264
niogAtf
1955-0244
6TRANSIST0R* J9ET N-CHANN6L 2N49S7
26460
1655-0244
Aiogii
16 55-0420
TRANSISTOR 2-PET 7N459I N-<KAN D-R006
04715
2N439I
Aigg*A
1955-0420
TRANSISTOR 2-PET 2N4591 N-CmAN 0-H006
04715
294391
AiUM3>
1955-0)69
ThANSUTDR 9-PET N-CHAN D-N006 TO-72 SI
26460
1655-0)66
AiOgio
l6 55-0>6»
TRANSISTOR J-FET N-CHAN O-ROOE TO-12 SI
29490
1955-0)61
Aigg^^
18i»-024e
TA4N8l8rOR-JPtT OUAL N-CHAN O-NUOE I0-71
26*60
1955-0246
AlPOis
6061-7047
TUH8l8fOaa FEI K0VA88F 83008
29490
6061-7047
A|Ogi4
6061-7047
IR4'<8i8TaRa FEf 8UV488F 83008
26*10
8061-70*7
AiJgAj
i8:»-0i*s
TkAN8IST0R J-FET N-CH4N O-NOOE tO-72 81
29490
1688-03*6
AigyAt
19»-0U20
Transistor pnp si PO*iOOM Fraisorntz
29490
1955-0020
AUgA4
4 9 55-0020
TRANSISTOR PNP SI PO*500Hi« Fr*150NK2
29490
1955-0020
AlPgAJ
1955-0020
IR4N8IS70R PNP 81 PO>lO0M FI-I80NH2
29490
1955-0020
AiOgAA
148*- 0071
lK«N8l8tQR NPN 81 PO*300Na Fr*200NHl
29490
168*- 0071
AiJg«»
148*- 0071
IHANSJSTOR NPN SI 90«)O0Ni FT-200NH2
29490
1954-0071
AiPgAo
I95i-(W20
TRANSISTOR 9»^ SI P0-)00*M 9T«150NH2
294 60
1683-0020
AiOMA
09U-00)2
2
RtSI*TOR 50R 5S 5tf P« 1C«04-20
516)7
R5-5
A4gKg
09 U-VO 32
R6SJSII* 50R 51 59 PH fC«04-20
41637
RS-5
aluHi
0499-9737
12
RESSSiai iOOR 56 .259 CC TC*-400/«600
01121
C610A5
AIVM4
0699-9757
USI8ian looa 86 .28a CC 1C— *00/«600
DII21
C61045
A|gh>
0b81-1>»$
4
REStSTUR ISA 5i bESN PC TC«-400/4600
01121
C61838
Aig«o
0644-2**8
2
U.8I8I0A 240K 84 .28U FC IC— 400/4600
01121
C62**8
A4aA7
0695-^445
86818701 2*06 84 .284 FC 1C— 400/*«00
01121
C62**S
AiWAb
0 7 57-0446
2
AlSISTO) 15R 16 .1259 F TC«0*-I00
24546
C*-l/6-tO-IS02-F
AiJM»
0757-044*
RcSISTUR ISA 16 .1259 P K*04-I00
24546
C4-1/9-T0-IS02-F
aiuHii ac
9*95-1326
9
Mii8IOR1JK8t .28N FC Ik— *00/*700
01607
C91335
ac SERIAL NUMBERS 1S23A018WANDAB0V
i 0 «Odn CA M and CA 7? •dcIv only to sen«l numMfi 1
V nCPlACES 0883 2036
e77AU041l sMiboos.
See Introduction to this section for orderinc information
6-9
Table 6-3. Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
064^3jg>
(cSiSTO* ).9K S( .2»M fC IC«-400/*70a
OUII
cm7s
A14A19
u<.w-«ni
KeSISfOO iOOH 50 .256 CC TC«-400/46yO
01121
C01065
J4d4«lU19
nisxsrw loo 5i .256 ft rc*-400/*500
0U21
C91015
4ia«a>
A16J$I0A ••24 54 .256 fC K*-4OO/*700
oim
CM77S
4IUIII9
WSISrOR IM >« .2»n FC IC***00/«(0«
01121
CS1S3S
4iaHi/
0a«i*2oi»
•
OtllSIOR 206 5t .256 fC 7C*-400/*600
0U2I
C8701S
4ivAi«
06W-4479
2
t*K i« .uii r rc>a»-ioo
2*S*S
C4-t/0-r0-14O2-F
4i«»ia^
g4M*3U4
0€5t$l(ll 17.04 11 .WOi f fC«O»-l00
24546
C*-l/l-70-17a7-F
AigA^i
044>>^2»
R£6lSrUR 5.60 51 .256 FC fC*-400/»700
omi
COSMS
>)bO-»6jS
HkSISKM S.61 S( .2»M FC TC-'bM/tTM
01121
C8SMS
4tgHtf>
oao>-l»i5
nlSCSrOR 15K 5< .256 FC IC*-400/^600
Bsa
CIISSS
AlJiU*
Q69e-e777
MlSI&fURt FIO lOQO OM .0>
Ktul
0690-977?
4igiu>
06W-44 79
RtktilO IM II .l2Slt F IC-0*-l20
Kfia
C6-1/0-TO-16O2-F
Aitfiue
04«>-t«29
HESISrOO 1.04 51 *256 FC lC«-400/*700
01121
C01925
lujx^r
lists lOR 220 56 .256 FC IC*-400/«600
OII2t
C0221S
AiUit^a
J6a»>3l«s
iiciiiiaa sioK }i .2»it FC u— <oo/**oo
01121
C95145
AiOKc^
0494^4737
KCSISfOR 1004 51 .256 CC fC*-400/«004
01121
C91045
AigRii
U4a>*iui9
15
lUSISfOR 104 51 .256 FC fC«-400/^700
01121
C91035
AiJK4<
O«03«»<»29
RESISIOA 5.64 51 .256 FC fC«-400/^700
01171
C05625
AiJKii
06a3-9il»
KtllSiai 910 M .2SH FC tC**«00/*«00
0U2I
coons
AlgftiA
gaee-a/i?
fUSUfOO 1004 51 .256 CC IC«-400/*000
0L121
C91045
AigHi>
04 U*>3415
USISTA 76.0 11 16 66 7CO6-20
91637
RS-1*
AiJHie
0694-a774
•RiSIITOKp FlU 10 OHH .OS
7I4I0
MO0-077S
AiOMJf
06«}-2ul3
•CSISIOO 20K SI ,2M FC FC»*OO/*S0O
01121
CI703S
Aig«>4
oeM*a777
OCSISrAa FIO 1000 OHM .05
21440
0699-9777
AtOK^g
osw-tri/
USISIW lOOK St .2Sri CC IC—*00/*«00
0U21
C01O65
44^*41
g*U-449i
WSiSTOR 20K IS .12SH F rC«0F>2S
0569I
FHF55S
AigH«<
0490-0492
Resist A 1604 11 .1256 f fC«0«-25
0366i
FME5SS
4lgH4»
0690-0493
USISIA 2A 11 *1256 F tC*Oe-25
03154
FRE55S
41 JH44
0490-0747
MSISTA 1004 51 .256 CC tC*-6O0/M00
01121
coioos
4igH4>
060J-914»
Resist A 514 51 .256 fC TC«-400/4000
01121
C99135
A|g«44
0490-0777
4eSIS7A« FXO 1000 OHM .05
264I0
0699-0777
4taH4f
OOn-3441
2
R£sisrtve set* iom/iookohm (iHciuoes R03i
2ISI0
0011-3*01
41i>M4«
10IO-O&32
NOTMAR-teS 0-RlN-SIF .l-f IN-SKC 7X100K
S62I9
216CH106X9FM
410H4*
10 10-0^32
NFIWOkK-MS (-FIN-SIF .l-PiO-SFCC 7X100K
56299
216CN106XAM
4UM»t
0e90-O7J7
R(S1S7A LOOM 51 .25« CC IC—400/«0<H>
01121
C9104S
4iaA»^
06 03-2025
KlSUrOB IK SI .2S« FC 1C— SO0/F700
01121
CS202S
Ali>K»i
0603-6225
AeSISTA 6.24 51 .256 FC IC— 600/»700
01121
C06225
AiJR44
0690-7332
ROSISrA IM 11 .1256 F IC»06-100
19701
MF5Ciy9-r0-lQ04-F
4iJi<»>
0690-7332
RESISIA IM 11 .1256 F tC*0«-10Q
19701
NF SCI/ 9- TQ-t006-F
4iaK»a
06 03-5145
R6SISTA 5104 51 .256 FC 7C*-000/»900
01121
C95165
0690-6920
5
RESISfA 54 .11 .1256 F TC*0»-25
03099
FME 5 S- 1 /0- T 9- 5001 -9
Aigk>4
0690-6320
RESlSfA 54 .11 .1256 F K*0»-25
03I9I
FNE 55- 1/9-79-5001-9
AigK>y
0693-|l>41
2
RESISIA 1004 101 2M CC IC«0M62
01121
H01O41
AtJHAi
0693-1041
ReSISrOK lOOK tos 2U CC IC-OFOS2
01121
H01O61
AigA4^
0690-0737
RESlSfA 1004 51 .256 CC 7C»-4OO/«IO0
01121
C01O65
AigH4i
OOU-3461
USISriVE SET, 10<Vil>0K0HI|l|INCLU0ESM7l
20490
0011-34 61
A10RO4
0690-077 7
RSSlSfA* FXO igOO OHM .05
20490
0699-0777
4iJM»
0603-7535
1
RESlSfA 754 51 .256 FC 7C—600F«900
01171
C07US
AtOH46
2100-3303
1
ReSISIA-fRHR 50 101 C 70R-A03 1-fRN
73150
72-101-0
41 JK4?
06 09-2025
USISKB 2K SI .2SU FC tC— M0/*700
01171
Ce2Q7S
A1044*
969a-»m
RcSISICn 1001 SI .2SH CC 7C— 400/PIOO
QU2I
C91065
AluMar
0757-0465
4ESISIA LOOK 11 .1256 F 7C«0*-100
24566
C6-1/9-70-1003-F
41^471
0757-0445
RESISIA LOOK 11 .1256 F TC*0«-100
24546
C6-1/0-TO-1OO3-F
41J«74
0603-2015
Resist A 200 51 .256 FC rc—400/»600
01 U1
CB701S
4iOH7A
0757-0460
1
RtSISIA 61.96 11 .1256 F tC*04-100
24546
C6-1/9-70-6192-F
AlgM74
06 03-4 725
e
AtSISIA 4.74 51 .256 PC fC«-400/*700
01121
C0072S
AI0K7a
0603- 1035
RESIStA IM 51 .256 FL IC«-600/«700
oiin
CB1035
4IOH7a
0663-2035
RtSJSfA 204 51 .256 FC fC*-600/»400
oiut
C92035
4|g47r
0663-4725
RESIStA 4.74 5S .256 FC tC*-6O0/*7OO
D1I7I
C94725
AiUHtA
06U-4725
RESISTA 4.74 51 .256 FC fC«-400y»700
01121
CB472S
AiUil7»
oms7i7
MSisrok FXD 1000 ohm m
28400
0888-8777
4UK4I
0083-2035
lUSISIO* 2K B« 7SW FC 7C*4<XV*«0
01121
C8202S
A1UK»<
0663-9145
1
USISrOR 9101 SI .2Sb FC TL— 100/*900
01121
CI01*S
Aig««i
0690-6737
4ESISIA lOOR 51 .256 CC 1C*-40O/*t00
01171
C8I0*S
A|gK44
0603-1035
MSISIOK lOK SI .2SH FC IC— «00/«700
01121
C91035
06 90-0737
RESISTA 1004 51 .256 CC i;*-400/*600
01121
C01O45
A1Uk4«»
0696-0777
RESISTA* FXD lOOO UHM .05
29490
0699-0777
41 JkctI
0696-6777
AESISTA* FXO 1000 AM .05
29490
0690-0777
• tOxM
ubft>-»ns
2
RESISrOK SIO SI .2SM FC IC— S00/F600
01171
CBSllS
4lUM«g
0603-5115
RESlSfA 510 51 .256 FC TC--400/4600
01121
C05115
AlgK»l
J603-2O35
HESISIA 204 51 .256 FC K*-600/*600
0U7I
CB203S
AUAn
0643-2035
RiSISIOR 2UK SI .ESR FC >C— 400/*ROO
01121
C92035
AlJKf^
06 63-302 5
4
RISISIOR 3K SI .2SM FC IC— ROO/F700
01121
C6J025
41^444
0 6 03-202 5
HeSISfA 24 51 .256 FC fC«-400/»700
01121
C92025
See introductiOQ to this seelion for ordering information
«-IO
Table 6-3. Replaceable Parte
Reference
Desigrtation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
0«ci-20i»
USIS7Q6 200 31 .2»V FC TC— *00/*4e0
61121
C82019
0AU-2OIS
USlSfOR 200 9t *298 FC 7C*-400/460C
01121
C62U3
AiOfiyr
B4BV202S
RESlStOI 26 S6 .2M FC IC— *00/»700
0L121
C62023
0»g>-2CD«
MVISriK 2K S6 .296 FC 7C*-*00/*700
01121
Ci2029
AIW9
oaee-«777
8ES16iai FXO 1000 OHM D6
2B480
0606-6777
A10R10V Rt02
06B3-3O3S
RESISTOR 206 » 2SW FC TC— 4aa/«600
01121
CB3036
A10R103
0683>472S
RESISTOR 4.7K i% Jtm FC TO- -40IV*6aO
01131
C64726
At0Rt04
(MS- 1336
1
RESISTOR 136 n 3SW FC TC-~40n/<600
01131
CB1338
Ainiw
1
FAOOING LIST. (fVO 03466-62601)
OtM 3?M
RESISTOR 7476 IK.I26W F TC^— lOOtSOVI
24S46.
C4-I/B-T0-7B7I-F
oe6e-M7
1
RESISTOR 8.0IK IK .129W F TC«O^IOOMSV}
24646
C4-1/B-T0-604R-F
0767-OA37
\
RESISTOR 4766 IK .I2M F TC-«7.^IOO(-XOV)
24646
C4-1/B-T0-4761- F
0767e^A»
2
RESISTOR 3426 (K I7SW F TC-4H-10OI3.8VI
246*6
C4-1fl-T0-3*21-F
0767-0*33
3
RESSTOR 3326 IK I7SW F TIHVirTOOM.OVI
24646
C4-I/B-T0' 3321-F
cm «*w
1
RESISTOR 246 IK .12SW f TC4--100I44V)
24646
C4-1/K..TO-2S0I-F
0«M-31H
1
RESISTOR 2376 IK .12911 F TC-0*-IOa(-40VI
34948
C4-1/K-T0-237I-F
0797>02rA
RESISTOl 1.216 IS .12>6 F IC-0--100
24964
C6-1/8-T0-I213-F
AidKiur
OA 89*2029
RESISIOI 26 SS -2SU FC rc*-*00/*f00
WTM
CI2029
AimOA
OAAi-4729
RESISr 06 *.76 31 .236 FC tC— *00/*700
vt m
CI4I29
06C3-4726
RESISICM *.76 3t .23H FC CC—*00/-700
WJm
Cl*723
A10R11I -lA
0683>47»
RESISTOR 4.76 SK 3SW FC TC--400/-700
KI E9
C6472S
Alkl^t Ag
0AW-0AO2
1
SHI rCH-NA8 REEO FUW A JVA 1200V CONT
21680
049>^0802
Aigu
9100-0678
1
T64NSF6RM1*. FtM.SE
28680
9100-0478
AiUU
9100- 3k7«
1
IRAIISFANER. fULSE
26**0
9100-M79
AlOUl
1826-0A69
2
IC nc i*3*C OF AMF
0*713
nci*»*CC
AlUU^
1826-0109
2
IC »U 2629 08 ARF
28680
1828-0109
AiJUd
1624- OAO*
1
1C LF 399 08 AA8
2701*
LF333H
AIUUA
1626-03A7
»
IC* J C0R8UIER LR339 SPEC.
28480
1*76-03*7
A10U9
1826*0i4r
lit 3 COHFUIER IH139 4FEC.
28490
1824-0347
AigM
1624-03*7
IC* 4 COMPUTER LN339 SFECo
28480
16 2 6- 03*7
AIUU7
1624-0*71
1
IC OP AMPLOW ORiFT TOM
02160
0PO7CJ
AIJM
1624-03*7
IC. J COPtPUTER LR339 SPEC*
28480
1124-0347
A4«»U9
1826-0967
IC. 2 COMPUTER LPI339 SPEC*
28480
1*76-03*7
AlUUU
1820-1196
IC-OIOITAl SH7*LS17*N TTL IS HEX
81299
SN76LSL74M
A1UU12
1820- U96
11-0161144. SH7*IS17*H 171 IS HEX
01293
SN76LS174N
AiOtilA
1820-1198
IC-DIUTAI SN7US174N TTL LS HEX
01299
SN7*ISI 7*N
AijgiA
1820-U16
IC-DUITAL SM74LS138N TTL LS 3
01299
SNI*LSI36N
Aiug&9
1820-1196
JV-0I81XAU SN74LS174M TfL LS HEX
01299
SN76LS174M
AiUUlA
1620-1196
1C-0I61T4L SN7*L$17*H TTL IS HEX
01299
SN76LS174N
A&guil
18^0-1196
ll-OICIIAl SN74LS174N 111 IS HEX
01299
SN76LS1 74N
Aluulb
1826-0147
11 HC 1*36C » 4RP
04713
HC1434;8
AidUi9
1820-0671
6
IC-D161TAI SN7*06N tlL HEX 1
01299
SN7406S
AiUMI
1820-1197
1C-0ICI76L SN7*ISOON 7U IS 9UA0 2 MANS
01299
SN74L SOON
AiOiM^
1820-1199
IC-016ITAL SN74LS04N TIL LS HEX 1
01299
SN74LS04N
Aigg<>
1820-1420
2
IC-OISITAl SM741S92N TtL IS OIV-X-12
01299
SN74LS92N
AioUcA
1820-0471
IC-0I61TAI SK7406N III HEX 1
01299
SN7406H
AlOtMe*
1818-2270
1
U* MU9-R0M
28480
1818-2270
AIJU<»
03466-B260I
NANOPROCESSOR ASSY INCLUDES A 10R 106*
28480
0346$-6290l
AiJlMl
1620-1198
lC-3lblTAL SN74LS03M TTL LS OUAO 2 NANO
01293
SN74L S03M
Aiag^g
1820-1199
IC-0I8ITAL SN74LS04N TTL LS HEX 1
01793
SN74LS04N
AlgU29
16 70-1197
IC-0I6II41 SN7*IS00N TIL IS 0U4D 2 MAMO
01299
SN74LSOON
AiJOil
1820- 1420
tC-DICII6l SN7M.S92N III IS OIV-X-12
01793
SM74LS92N
AWUi<
182^1112
1C-016ITAL SN74LS74N TTL LS DUAL
01793
SN74LS74H
AiOUi>
1820-1112
IC-016JIAL SN74LS74H TTL LS DUAL
01299
SN7*IS7*N
AiUUiA
194^0677
2
OPIO-tSOLATOi LED-POIO/XSIR IF«50HA-HAX
28480
1990-D977
A1JUA>
1990-0677
OPTO-JSOLATOi LED-POlU/XSTR JF-SOHA-MAX
7***0
1990-0S77
Aiguia
1826-0190
1
1C V RUT8
27014
SL2«ea3-24
AIOU>/
1826-0299
1
IC V R6LTR
7701*
LIA320T-34
A|gg3A
1824-0386
1
11 7613C V ROlTR
03237
761SUC
AkJgA9
1826-0277
1
IC CM 320 V RGLIR
2T014
LM320I-13
120^0109
4
Hfll S1N6 SCI IO-220-F6C
28480
1703- 03 09
Aig«i
ag49V-6l607
1
CA6LE ASSEHSLVt L.i.HNClUOES FI)
20400
03499-41607
A|g«2
03 499-61608
1
CASlEt 10/1 OlVIOER
28489
03*33-61*00
AlUAl
1200-0666
1
SUCXEI-IC *0-C(WT OIF-S106
OOtlJ
A-23-20307
AIJTl
0410-0663
1
C67SIAL. 0U4RI2 46IS300IIH4
20**0
0610-064)
9060-0170
CUJDEiPLUC-JN PC ftOARO
7**60
9040-01 70
AUAC
11T77-68S01
1
ASSEM61V. REFERENCE
28483
NOT FIELD REFAIRABIE.
REBUILT EXCHANCE ASSEHBlV
11177A
REFLACEUENT ASSEMBLY
AA RESISTOR t
10R1I1 AFRLIESONIV
TO SERIAL
NUMBERS 1S22AC041 1 ANO ABOVE.
Am RP^ri9W»rrH Aimt APPI iPSONLVTOSCRIAL NUUeCRS 1622AOO«10 and below.
AC RERLACEWITHATOASSEHSIYRART NUMBER IIITTBFOR RERLACEUENTOR EXCHANGE.
1 1 1
See Introduction to (hi* Mction for ordeHtw Information
fril
Table 6-1. Replaceable Part»|Cent'd)
HP Part Number
Description
0J46S-C6612
0180 0230
0180 OIM
0160-0182
1901 0060
1902 0777
1901 -0060
1901-0036
1902 3136
1901 0060
1866-0747
1663 0020
1864 0087
1664-0079
1866 0247
PC ASSEMBLY. OHM CONVERIOH
CAPACITOR rxO lur>-2<7<(50VDC TA
CAPACirORFXD 036UP* KK2DOVOC
CAPACITOR FXD 4700Pf '-lOk 200V DC
OKWE-SWITCMING eOV 200MA 2*(S DO 7
DI008 2NR ineTS 62V 66 00 7 PD>26W
DIODE- SWITCHING 80 V 200UA 2NS DO 7
DIODE-HV RECT 1KV 600WA 00 29
DIODE -ZNR 826V 66 DO-/ P0-.4W TC-*063%
DIODE -SWITCHING BOV 200UA 2NS 00-7
TRAKSISTOR-JHT DUAl N-CHAN 0 MCOE TO 71
TRANSIStOR PNP SI POOOOWW FT-160MH2
TRANSISTOR NPN SI PO«360MW FT*7SMHZ
TRANSISTOR NPN 2N3430 SI TO-6 PO«1W
TRAhSiSTOR-JPEr DUAL N-CHAK D-UODE TO-71
0883-1116
0883-4326
0767-0068
0883 2736
ceee 44S8
0898 4702
0767- 0442
0683 1236
0883 4716
0863 2426
0883 3036
RESISTOR 110 56 26W FC TC- -400 -800
RESISTOR 43K 6% 25W FC TC'-ADO'-TOO
RESISTOR IW Ik 6W P TC-0< 100
RESISTOR 27K Sk 2SW FC TC- 400 -800
RfSISTOR 1.I3K t« 12SW P TC-D- ICO
RESISTOR 6 87K Ik I26W P TC-O--I00
RESISTOR >0K Ik I26W P TC-0- tOO
RESISTOR 17K 6k 76W FC TC- 400 *800
RESISTOR 470 6k 26W FC TC- 400 -800
RES'STOR 2.4K 6k .76W PC TC- 400 -TOO
RESISTOR 30K Sk 2SW PC TC- 400 -800
0888 3461
0883 7736
0767-044?
0883 4336
0663-1636
0683 1236
0883 1126
RESISTOR I33K Ik 126W F TCx-100
RESISTOR 27K 5k 26W FC TC— 400-100
RESISTOR 10K Ik I26W FTC-0--100
RESISTOR 43K Sk .255 FC TC- 400 -800
RESISTOR I6K 6k 26W FC TC--400.I800
RESISTOR I2K 6k 26W FC TC>- 400.-800
RESISTOR ■ IK 6k 26W FC TC* *00.*700
■lA SEEN07E0NSCHEUATIC4.
-IB SEENOTEONSCHEMATIC4.
Mfr Part Number
03466-66612
I6001D5X0090A2
0180-0164
0160 0167
1901 -0060
114879
1901 0060
1901 0038
SZ 10938 168
1901-0060
1856-024/
1863 0020
1864 0087
7N3438
18S5-0247
C81I16
CB4326
MF7C1.2 TO 1004 F
C8273S
C4-1/8-T0 1131 F
C4 V* 10 8871 F
C4 t«-r0 1002 P
CBI236
C847I6
C82426
C83036
C4 l'8-TO 1333 F
C82T36
C4 18 TO- 1002 F
C84336
CBI636
CBI236
C8H2S
Table 6-3. Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
OT AO- 0009
1
USISfOR lOOR 29 IM HO TC«06-200
IISOZ
R632
*^211
9100-0679
1
tAA6S2aiMeA» AULSC
28680
910^0679
Al^Ul
1020-0223
2
10 AN 301A or AMA
27018
1H301AN
kiilU
1A20-022)
1C LA 30IA OF AHA
2T016
LM301AH
Alt
03A5»-'M913
1
6*C« ASSEMILY* AC CONVEMER
28680
038SB-88B13
«1*CI
0160-2199
6
CARACIfOR-fXO 30#F «-S9 3006V0C MICA
28610
0140-2199
AitU
01AO-AA06
1
CAFAClfOH-FXO •19UF 6-109 lOOVVOC 901 fF
28680
024&-66C6
AliCt
OlAO-AAOl
3
CAFACirCM-riD .oil# »-iO« iooavoc MCTf
28610
0180-8801
AliCA
010^6402
1
CAPACITOA-FXD .11# A-iOt lOOMVOC POLTF
28610
014^6602
klM
0t60-2l99
CAPAClIU-fXO 30FF «-9( 3006VUC MICA
28600
0140-2199
AiJCA
0I6»*«390
3
CAFACIIOK-FXD .0821# *-iOI 200MV0C POirF
28880
OUO-6398
Aticr
0160-6390
CAFACIfOR-FXO *092UF 6-lOt 200WV0C FOiVF
28680
0180-8308
*I3M
0160-6601
CAFACIYO9-FX0 «01UF »-10l LOOHVOC F017F
28610
014^ 6601
A1»CV
0 1 60-6601
CAFAClTM-fXO •OIUF *-109 lOONVOC 60179
20680
0140-6401
AUCU
0100*0229
CAP8CIIUA-F80 33UFA-I08 lOVK TA
B8288
1BDOS38X901082
«tiCl2
0100-0197
CAFACIY09-FX0 2«2UF6-10I 20VOC YA
S62IF
190022SX9020A2
0100-1799
CAFACIY09-FX0 *22066-101 39V0C YA
96219
IS 00226X9 03 9 A2
0160-2199
CAFACIYOX-FXO 30FF 6-9t 300HV0C MICA
28610
0140-2109
A1AU>
0121-0632
1
CAFACItaa-V TRNR-AIR I.T/lA.IAf 390V
769T0
I89-BOB-I2B
AilCia
0160-0761
1
CAFACITOA-FXO 9FF *-108 900HVOC MICA
28880
0180-0783
A13C17
0I«M»3
f
CAPACITOR-FXO 620PF '-Bk 300WVDC MICA
28880
OttO-0383
AI3C10
OI80->}«
>
CA/Acrroft-Fxo i&uf^-ioiitdvdc ta.
58268
lB0DIBeX9030B2
AI3C1*
OMO-3M
I
CAFACITOM-FXO 348FE-*.lk lOCWUDC FORC
2840&
0100- 3048
A13C21
0150-0003
,
CAFAcrrm-FXD j>iuf ««o-2e» lOOwvDccte
2888D
0160-0003
A13C22
0100-0107
CAFAC(TOH-PXO 30VOO TA
68280
<B022Mt020A3
AI3C33
otetk-siM
1
CAfAcrroft-Fxo iiiuF 4.10H tnwvDC cer
28480
0160-3138
A13C24
0IB0-O1S7
' CAFACITOR-FXD 2.2UF*-10« iOVOC TA
58280
160072SX9030A2
A13CSB AA
OICO-0378
^ CAFACirOR-FXO27PF*-MSaOV0CWICA
28480
0160-0181
0100-7150
CAFACiron-FXO 33FF 4-6% 300WVOC MICA
38880
0160-2160
0140-0100
CAFACirOR-FXD30FF 4-SX 30MVOC MICA
28480'
0140-0100
A1X96
0160-394S
2
CAFACITOR-FXD 38FF *- IkSCOlWOC MICA
28880
OI60-%86
A13C27
01SO-0096
1
CAPAOTOR-fXD .OeOP »00-20X 100V7VOC CER
28480
(UBDtOIBB
AI4UA
0160-2199
CAFACI7OR-FX0 30AF 4-39 3O06VOC MICA
28680
0140r2199
AlAU)
0160-3976
1
CAAACIYOA-FXO lOFf 4-lt lOOOMVAC FORC
28680
0180-3678
Aiit>I
0t(O-»77
1
CAFACITOR-FXO 970FF 4-19 lOOHVOC FORC
28660
0160-3677
0160-0202
1
CAFACITOR-FXO ISFF 4— S| 900VVOC MICA
72136
0Mi9ClStU0900«VlCR
AliLSy
0160-3930
1
CAFACIIOA-FXO lOFF *-18 2SQ0MVDC FORC
28600
0140-3930
AUC3A
0121-0636
2
CAFACJUR-V TRMR-AtR 2.6/26. 9Ff 390V
76970
U9-S09-12S
AlMi
0l«a-s»8i
2
CAPACIIOR-FXO .lUF 4-209 6306VOC NCY
FR002
00710640
AtiCKi
1902-3237
3
0100E-2NR 20V 99 00-7 F0*.6H TC«4.0739
08713
S2 10639-286
AUtA^
1901-0033
2
OIOOE-6EN FAR 180V 200HA UO-7
28680
1601-0033
AUCki
19 01-0060
2*
OJOOE-SHlfCHlNO 90V 90MA 2N5 00-39
28680
1901-0060
AUcRA
4901-0033
OlOOE-CCH FRt 180V 200HA 00-7
28680
1901-0033
AliCA>
1901-0316
i
DID0€-9CH0YY«f
28680
1901-0S18
AliCAb
1904-0919
OJODE-SCHOTYK7
28680
1901-0918
Al>l.*i
<907-3128
i
D10DE-2MA 7.32V 99 00-7 F04.66 YC«4.0699
06713
S2 10939-163
A|>CHA
19G1-0O6O
0103E-9HITCH1NC 30V 50HA 2NS 00-39
28680
1901-0060
AUCK9
19CI-0060
0ID0E-9alTCHlNC 90V 90HA 2N& 00-39
28680
1901-0060
ADUli
19U-OO60
OIODE-BHITCHINC BOV BORA 2N3 00-3B
28680
1601-0080
AliCAiA
1901-0060
OIDOE-StflYCHlNC 30V SOMA 2MS 00-39
28880
^ 1901-0060
AtiCKli
1902-3096
2
OIJOE-MR A.IBV 28 00-7 FO-.AH 7C— .0188
08713
$2 10939-99
AiiCHib
1902-3096
DI30E-2NR 4.7BV 28 00-7 F0..4V 7C— .0188
08713
S2 10639-6D
Aiiua^
1901-0060
ia02C-3MiYCHlNO 30V SOMA 2MS 00-3S
28680
1901-0080
AlJCkIft
1901-0060
OJOOE-MIYCHIMO 30V SOMA 2Hl 039
28680
1901-0060
Ai>CRif
19C1-0067
2
OIODE-SVJ7CHINC 20V 7BRA IONS
28680
1901-0067
AtJCkiA
1901-0O67
OiOOE-MlICHINC 20V 7SW IONS
28680
1901-0067
AlKni^
1901-0O6O
OlOSE-SVItCIUMB BOV BORA 2NB 0O-3B
28880
1901-0080
AlilA21
1901-0060
OIOOC-SMJTCHIHO 30V SOMA 2M9 00-39
28680
1901-0080
A4tCK2A
1 19 01-^60
OlOOE-SVlYCHiMO 30V SOMA 2HS 00-39
28680
1901-0060
AllAl
dA9O-0ea3
RUtT-REEO 18 lOORA lOOOVOC BVK-COU
28680
0890-0663
AlilU
>>490-0883
AUAV-RE60 lA iOOHA lOOOVOC SVOC-COIL
28680
0690- 06B3
AIJM
049O-OLA1
RUA7-RE60 lA lOONA lOQOVX SVOC-COU
286 80
0690-0*43
AtiUi
ttM-0)j71
YMHSISTOR HPH SI FObJOONi FTb200HH2
28680
1896-0071
AitUA
188A-OOM
YRANSISIOR MFH $1 F0«300M6 PY4200MH2
28680
1856-0071
AiiAA
18t^0l»€>
6
YRAVSJStOR 3-FEf 2M6392 N-CHAM D-MOOE
C6713
' 2N6392
AUUA
1953-0396
YHANSlStOR 3-FEf 2M6I92 IHCHAN (HHOM
06719
2N8392
AiJW>
188>038A
YRANSJSfOR 3-^EY 2166362 6-CHAM O-MOOE
06711
, 2M8392
Aiiwv
1838-038A
IRANSISrOR J-FEI 2N4382 H-CNAN O-MOOE
08113
2H6392
A11U7
1696-0391
2
I IRAMSISrOR NAN SI 10-18 FIMBAOMM
28610
1896-0391
AL^gA
ib:>-ovio
' YhAVSISYOR FHP si 10-19 FO*360MM
28680
1853-0010
AUUW
1959-0620
YkANSJSYQR 3-fET 2M6391 M-CHAM O-MOOE
08713
2N8J91
At>gii
1996- Oifl
TRANSISTOR NFM SJ TO-ll F0-360MN
28680
1896-0391
AA SEE NOTE ON SCH
u
I
<81
See introduction to tbit tection for orderinf information
6*13
Table 6-3. Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
IAU*OOiO
rMNSisfw RNp SI ro-ia rd- 16 bnh
26460
lasf-Mio
Aiitfii
I6»^007i
TMNSISTOK HM SI a^SOOW Fr>200IUU
26410
1654-0071
lass- 0*20
miNSISiaR J-FET 2M*3»I H^NAM [KHOOC
0*713
2N4S91
AliOl)
iaSS-0202
1
fUHSISIM-JFII Mat. M-CHAH O-NOW SI
17tSA
i*21
AlJAi
0At>*»U»
aesisrw sioB s« .asii ac rc>-aoo/*wa
01121
C65149
klM
06U-223S
6
USISTOl 22R sa .2M Ft tc--*oo/*aM
01121
C62235
AUAi
AESISIO* 22K SS .2SH FC IC*-*00/*aW
ami
Ct22*S
AliHA
QA96-349A
2
ftfsiSToa )*ai It .I2SH f u>o*-ioq
UA3I
CRF-SS-l, 1-1
AI^A5
AESISTOR s*ai It .USN F tC-Oe-lOO
91437
CJiF-55-le T-1
AiJH6
oTsr-o*6S
66$|$r06 lOOfl 16 .1256 f TC*0»-100
24544
C*-l/l-tO-IWS-F
atiHl
orsr-WTo
1
6E4IS7QR 2491 IS .I25N F fC*0«-100
24544
C*-l/a-T0-2*9S-F
AUAi
UOOS-22SS
MStSIIK 221 St .2SH FC TC«-*00/*tM
01121
C62235
A13H9
U««3-i03»
AaSISIO* 1M St .2SU FC tC--*00/*200
0U2I
CB1035
Alikll
06U-»1«S
AESiSIOI StOa SI .2SM FC rc>-tM/*»w
01121
casus
AUA12
21OO-1J0A
3
kf Sism-IIWR SOK lot C SIDE-AOJ ir-IM
32997
3008P- 1-503
airaii
2400-»3i)«
1
atsisTOR-iRm 2x tot c siOE-aoj iT-rtN
32997
3004P-1-202
AUAiA
U696-A447
1
USISIO* I.OSK It .12SB F rc«o»>ioo
2*S4A
c*-t/a-ro-iosi-F
Ai>Al»
06U-t0)S
RESiSTO* loa SI .2SM FC rC>-*00/*T00
0II2I
CBIOSS
AliHi*
07S7-O40I
RESISIOR IM 11 .12SH F IC«0*'1M
2*s*a
C*-l/a-70-iai-F
AliHl7
00^3122
1
RESISiOR *12 It .I2SU F tC-0*-tOO
03161
FRESS-l/a-T»-*l20-F
AlAfti«
0«»*2OA»
2
acsistat 2001 st .2Sn fc ic«-aoo/*9»o
01121
C62045
A41MI9
oaai*»»ios
5
RESISrOt Si St .2SU FC tc— *oo/*soo
01121
CI5105
kiSkil
0757-0453
1
RtSUrOR so. IK It .12SM F TC*0*'tOO
2*s*a
C4-i/a-Ta-sot2-F
AlitUi
06*o-**aa
1
6E5l5tQR 24*7A IS «125H F fC«04-100
2*s*a
C*-l/l-T»-2t72-F
AiitUi
2I00-530S
3
RESISTOR-TRWI SK lOt C SIOE-AOJ It-IRN
32997
3004P-1-S02
AlikZA
06OS-202S
AESISIOH 2K St .2SU Ft TC— *00/*2M
01121
CB202S
AkilU9
0450-1215
3
RESISrOR»«K 6» H/O MATCHED SET R2SJ8, 431
26460
oaaa-tcis
AliK^A
06«>-2025
RESISrOB 2K St .2Se FC rC«-*00/*700
01121
C62025
Aiiiur
04 53-4015
RESISTOR too SI .2SK FC IC*-*OOT*SOO
01121
CtlOlS
AIM4
068S-261S
1
RESUrCR 240 5S *25H FC fC*-400/»400
01121
CS2*1S
AktiU*
04 03-22A5
RESISTOR 22R 5S «25H FC fC*-400/»600
01121
CB22SS
AiiK3l
0o«5-lil35
Risisrn lOR 5S .256 FC 7C«-400/»700
01121
C61035
AlAAA^
0463-5145
RESISrCB SIOR St .2SM FC tC— BOD/*M«
01121
C65145
AiJHi}
0 7 57-0442
RESISIO iOR It .12SR F rc*0*-100
24544
C4-1/6-T0-I002-F
AIM34
0*B}-U)S
RESISTOR UK St .25W FC TC«-400/*600
01121
CB12SS
06n-302S
RESISIOR 3K 56 .ISU FC TC--400/4700
01121
tajius
AlJK^o
21CO-3304
RESISTA-XU6 SOK lOS C SIOE-ADJ 17-764
32997
3006P-1-503
AljKi/
04 63-4715
RESISTW *70 St .2SU FC TC— *0a/*600
01121
C64715
AAik30
3498-621 5
RESISTOR AtTK .5« (P/0 MATCHED SET R2S.3S,43I
26460
0696-6215
AliJC>9
0499-4202
RESISIOR 6.67K it «l25lT F TC*0»-100
24544
e*-i/B-To-aa7i-F
0498-4202
RESUra 6.67R IS .125V F TC«0^i00
24544
c*-i/a-io-ae7i-F
AiikA<
04W-4202
RcSISIO a.aTK It .12SM F IC-0«-100
24544
C4-L/i-T0-66n-F
AiiK%)
04 96-6215
RESISIOR 2M ,S% IF/0 MATCHED SET R25J8.43)
2 B*aO
0496-6215
AliAAA
04 96-6216
4
RESISIOR 202K SR IF/0 HATCHED SET R44, R4SI
26460
0496-6216
AiiH^i
0498-6214
RESISIOR 2H .SR |F/0 MATCHED SET R44, R4S)
26460
0696-6214
AliHk\*
2 1 00-3311
2
RESISIOR-IRNR SOO tOt C SOE-AOJ iT-TRN
32997
3004P-1-501
AiiiJl
1824-0099
3
1C LN 201A OF AMR
27014
LM201AM
Ai»\a
tajb-ousa
IC IM 201A OP AMP
2701*
IM201AH
*i>U>
leio-gfSa
1
U. FIW LINE CHIP
26460
1610-0250
Al)4>4
1628-0059
IC IM 201A OP AMP
27014
LM201AH
Alili)
1628-0109
SC HA 2625 OP AMP
26460
1624-0109
Ai»U»
1620-0471
iC-JICITAE SNT*0*N TU HEX 1
01295
SM7406M
16U0-0SIS
1
STAHPIN61 6A3 «020** THK
lAsas
080
4040-0746
2
EXIRACrOk-FC BO etK FULTC .0*2-a0-IMtNS
26460
4040-0746
AiA
03455-44514
1
F.C. ASSEHBCT. AO CONVERTER
26460
0USS-6AS1*
Al4vi
ai>>-o>M*
3
CAPACItUR-FXD .lOF «IO-20t 1006F0C C6R
26460
0190-0064
Ai4W
0140-4396
CAPACtTQR-FKO .6620F 4-136 203HV0C POiVP
26460
oi&o-*39a
A44bi
0140-0149
1
CAPACITQR-FKO 470PF 4-5S 360MV0C MICA
72134
CRISF*71JOSOOHVKA
A44C4
015^0064
CAF4CITOR-FXO .lUF *tO-20t lOOVVK CER
26460
0150-0064
A4 4C>
0150-0064
C4FACITOR-F40 .lUF *t»-20t lOOkVOC CER
2t*IO
oiso-oaa*
Ai4kk
014^2204
CAFACITOR-FXD lOOFF «-St S70BV0C RICA
2t*t0
0160-2204
AiileAl
iyo2-3<ai
0I306-6MR 26V 56 00-7 P0«*4H rC«4.073t
0*71S
SI im}«-2A»
M4I.1U
1901-0376
OIOJE-QENFRF 3SV SOMADOX
26460
laoi-OSTB
A|4CKi
190I-U040
DIU0C-SVlfCHjM6 30V 50NA 2NS 00-35
26460
uai-oo*«
AI4vAA
i9ci-uar*
DtOuE-ttH PAP 35V 50HA 3(KT
26460
l«01-077a
Ak'sCK?
isoi-oira
DI306-8CM PRP 35V SOMA 0CH7
21460
1901-0376
at«Ua
19 01-0376
OIOOE-GENFRF XV SOMA OO-X
2l»tD
l«Ot-C37t
AlAVKr
i»oj-3csr
OJOOt-lNR 20V 5t 0(H7 P0«.4V TC«4«073t
0*7IS
S2 10939-269
AiALkO
19C1-0U40
SOSE-SHIICHIMS SOV SOMA 4NS DO-SS
26460
1901-0040
AUCK4
1901-0040
OIOOE-SMITCHINO SOV SOW 2NS D0-3S
26460
1901-0040
A|4tAiiJ
19 01-0043
OlOOB-SHiTCHIHC 30V SOMA 2NS 00-35
2a»ao
1901-0040
AA SERIAL NU
HERS AN
> ABOVE. R
lOTE |A6t ON SCHEMATIC B.
See introduction to this lection for orderint information
6-14
Table 6-3. Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
aiacau
1401-0311
OJ 00 E- SC HOT Tier
21480
laoi-osia
at*cat<
1401-0040
0I00C-5H1TCHIH4 30¥ 30<U 2MS 0<H33
24440
1901-0640
4i«ai
1133-0020
UANSiSTOt pm $1 A0»300HII 7T-130AH4
24440
lasvooEO
41442
less-wsa
1
raaNSiSTOi MR SI ro-ts aCMSaonH
24440
lass-oosA
41402
14 33-0420
raaNsiSTOT j>set ENaiti h-chan d-mm
04711
ENASai
at4M
1433-0033
i
lAtNSISTSa ArfEt N-CHAN D-NOOE JO-1Z SI
Eaaao
ItSS-OOSS
atass
1
laANSISTOR-JKI DUAL N-CHAN D-NOOC TO-7.
24440
lass- 024.
4I4M4
1133-0020
raAHSISTW aw si aCNSOOW Er>ltOHH/
24440
ItSE-OOEO
aiaai
04B>-I03e
1
RESISTOI tOK SB ,2SN fC TC— AM/*r0O
01S07
CB1036
41442
04 43-2023
KSISTOR EB SB .ESB RC tC— ABO/rTOO
OIIEt
CIEOES
41442
06 94-3133
RESISTOR a.aaK ib .iesh r tc>o*-im
EAsaa
CV-l/a-TO-AAAl-F
41444
OBII-ESTT
2
i€SIST04 104 *|t •I23M PW TC«06-2
laiao
1274-1/14-A-1002-I
41444
orST-oasa
1
tESlSTQA 4.32K It .USH P fC*0«-tOO
24346
CVl/6- T0-4321-F
41444
0737-0240
USISTOt U 18 •123H F TC*46-100
24346
CA-l/a-TO-l001*F
ai*a}
D6 SB- SEES
t
tisisroi 6d49K 18 .123M F tC»06-100
24366
C4-1/6- T0-6491-F
41444
oTsr-oaao
1
AESISIGPl 7.31 18 .1234 F rC*06-lM
24366
C4-U6-7^7301-F
41449
0737-0442
1
4631 STA 754 11 .USH F IC«0»-100
24346
CA-1/6-TO-7302-F
414412
0737-0430
1
RESISTOR E.EIR IB .USB f TC'IX-IOO
24346
C4-1/6- T0-2211-F
414411
sasa-ssu
1
RESiSIOR aas tB .lESU F TC«0*-100
24341
CA-ua-ro-AASR-F
Altaic
04 43-3023
RESisroR SR SB .ESN Fc ic— a«o/*roo
eiiEi
casoES
41441 1«
oaas-22as
1
4fSISr04 22N 5t *23« FC TC«-900/«1200
01121
CBEEAS
414414
BTsr-oaaE
RESIStOt IOC IB .USH F TC*0»-IOa
24546
C4-1/8-TO-1Q02-F
41441a
a«ii-soiT
1
REStsrOR is.aa iB .tESi pn TC-o*-s
14140
issfr-i/a-c-t«aE-F
414414
0737-0441
1
Aisuroi 4.23R 18 r123W F TC«06-L00
2434<
C4.I/0.TO-623I-F
41441 r
orsT-o*as
41S1STQR 1004 14 .1234 F rC«Q»-100
24343
C4-L/6-TO-1003-F
aiMis ae
or ST' 027}
cesisiai 3DIK IB .lESa F rc*o«-too
03S7
CA-l/a-TO-3011 -F
aiSHi* ae
(Mm^44An
1
44SSSr04 049 18 «U3H F TC«0*-100
03202
CA-lFa-tO-*4»R-F
aitMcj aB
oeBS-arre
RESISTOR 0.A0K1B .ISSN F tC-0*-100
03»2
CA-I/I-TO-040T -F
414421
osu-urr
4ESISTCR 104 «|8 rIISH FOri TC«0»-2
14143
1274-1/10-4*1002-6
414422
0694-3133
4E$|$T01 4.644 18 .1236 F TC«0«-100
24544
C4-1/6-T0-4641-F
414424
0643-4213
1
4831 SrU4 420 3C .23H FC TC«-400/»600
OUEI
C66213
at«u* ag
Da«3-<o%
RESISIOR tOK SB .ESe FC TC— A00/«700
01607
C61Q36
attiua AB
0643- 1038
RESISTOR TOK SB .250 FC tC*-a00/«7O0
01007
C01036
414424
0 6 94-3260
2
4EStSTtt 4644 18 .USV F TC*0*-100
9163?
CnF-3»-l* T-i
41442/
0694-4649
Z
4tSl$T04 1.2M .IS .23H F TC«06-23
1970L
nF32C-l
41442S
0643-2733
RESISTOR ETR SB .ESB FC TC— aO0/*«0O
OUEI
C6273S
414429
0643-3923
1
RESISIOR S.SR SB .ESN FC TC— aOO/*TOO
01121
C63925
41442U
0694-4649
RESISTOR l.2an .IB .2SH F TC-0<-2S
I9T0I
■FSEC-i
414431
0694-3260
RESisrcR aaaR ib .usm f rc-D*-ioa
91637
CM-5S-1. r-l
Al-skii
0694-3499
3
4E$|$1<K 40.24 18 .123H F TC«06-100
24346
C4-1/6-TO-4022-F
414«ii
0494-3499
4631 3T04 40.24 18 .123H F TC«0«-100
24346
CA-l/8-tO-AOEE-F
414434
0643-1023
1
RESISTOR IK SB .ESN FC TC— a00/*600
01121
CBIOES
414«3>
U696-3499
463I3T04 40.24 18 .123h F rc*0«-100
24346
CA-I/I-TO-AOEE-F
414436
0643-2433
1
RtSiSrOR EAR SB .ESK FC TC>-400/*a00
OUEI
C62433
414437
oaBS-lusS
4C3I3104 lOK 58 .23H FC TC«-400/»700
01121
C61033
4l4Ai4
VaS>-i9aS
1
RESISTOR MOR SB .ESR FC TC— B00/*900
OUEI
C63043
414«U4
0643-3023
RESISTOR 3K SB .ESN FC TC— 400/»TOO
01121
CS90ES
414K49
0797-0442
463I3T04 104 18 .1234 F TC«0»-100
EASAA
CA-l/l-tO-IOOE-F
414441
0737-0442
■Esisrni lox IS .tESa f ic*o*-too
24344
C4-1/6-T0-1002-F
414442
0643-4733
1
RESISTOR ATR SB .ESH FC TC— AOO/raoO
01121
C64733
414K43
0643- 2UJ3
4631 ST04 204 38 .236 FC TC*-400/«400
0U21
C.EOSS
414x44 A A
0643-3046
3
4ESISTQ4 2M 38 .236 FC TC*-900/»1 100
01607
C62086
414X43
Aaas>ioas
46313MB lOM 38 .23H FC TC*-90O/«ll00
OUEI
Cei069
414446
0643-1063
46313104 ion 38 .236 FC TC*-900/4ll00
01121
CBIOAS
414447
06 94-4478
i
46313704 9.764 18 .1236 F tC*04-100
OJIM
FNES5-tra-T0-»TAl-F
A14A44
o7»r-oso7
1
RESISTOt I«K IB .lESU F TC«0*-100
03292
CA-ira-TO-1823-F
414U1
tsoa-ooro
2
OlOOE-ARRAT
Esaao
1906-0070
aisu<
19C6-0070
0I006-A44AT
Eaaao
laOA-OOTO
414133
t«2a>047l
z
IC ORAMF LOW-DRIFT TO<M
OEIBO
0P-07O
414134
14 26-0309
U 60 318J OF 6HF
EASSS
A0316J
A14U3
te<o-0Ear
1
IC* PHPLn 0P£4AllUNAk
13616
741C8009
414W6
1426-0134
t
1C cn 339 COnFAAATOi
ETOIA
CH339N
3U40-6643
z
EMf46CT04* F.C« 40440
21460
5040-6643
3000-9043
z
FliMF.C. 4064D CXT44CTU4
26460
3000-9063
aa stt s
OTE ON SCHEMATIC 4.
AB SERIAL NUMBERS 1«23A062a> AND ABOVE. SEE NOTE ON SCHEMATIC B
FIS
Sec Introduction to thii section for orderinc information
Table 6-1. Replaceable Partt(Cofird)
Reference
Designation
HP Part Number
Qty
Description
Mfr
Code
Mfr Part Number
AIS
034E6-88E1E
H
AC ASSEMBLY. AC RMS
28480
03456 88515
A1EC1
OIEO-0171
CARACITOR-FXO 1UF *90-20% fiOWVOC CER
28480
0150-0121
A1SC2
0170-0088
CAAACITOR -EXO .027 UF 200V
28480
0170-0066
A16C3
0170-43038
1
CAFACITOR -FXO 32 UF 20OV
28480
0170-0038
AI6C4
0180- 30M
1
CAAACITOR-FXO 1UF • 10« 100WVDC CER
78480
0180-3094
AlSCi
0180 3134
CAFACITOR-FXD 01U1 •-10» 1D0WVK CER
28480
0160 3134
AIKS
0180 303S
1
CAFACITOR-FXO 7S0FF • 5S 30WVOC MICA
28480
0160 2038
A1SC7
0180 330<
CAPACiTOR-fXO 100RF *-6% 300WVOC MICA
28460
0160 2204
A16C8
0160-0163
CAPACITOR 'fXD 033 UP 200V
26480
0160-0163
AIKS
0160 3666
1
CAPACITOR-PXO UP *- 10% SOMTVOC MET
28480
0160 3686
AIKII
0180-7284
CAPACITOR-FXO 20PF •-$« 900WVOC CER
28480
0180-2264
A1KI2
0140-0198
CAPACITOR-FXO 200PF «-5» 300WVOC MICA
72138
DMtSF201J0300WV1CR
AIK'3
0180 2257
CAPACITOR-PXD 10PF *-6% 600WVDC CER
28460
0160-2267
A1SC1AC1S
0180-0391
CAPACITOR-PXO 1UF • 10% 36VOC TA
69209
1600I06X903BA2
AtKIS
0160-3367
CAPACITOR-FXO 10PF •-5« 50OWVOC CER
28480
0190 2267
ATKJ7-19.CI1
0150-0121
CAPACITOR-FXO lUF >80-20% SOlWDC CER
28480
0150-0121
AIK22'
PADDING LIST
0160-3767
CAPACITOR-PXO 10PP ••6% 6O0WVOC
28400
0180 2757
0160 3368
CAPACITOR-PXO 12PP «--6% 500WVOC
28460
0180-2268
0160 3361
CAPACITOR-FXO 16PF «-6% 600WVDC
28460
0180 2261
A16C23.C74
0160-0131
CAPACITOR-FXO fUF *80-20% SOWVOC CER
28480
0150 0121
AISC2S
0160-3648
CAPACITOR FXO 346PP *-t% 600WVQC PORC
28460
0160-3640
AISC2S
0150-0121
CAPACITOR-FXO lUF >60-20% 50WV0C CER
28490
0160-0121
AI6C2T
0160 3646
CAPACITOR-FXO 38PF *-t% 600WVOC PORC
26480
0160-3945
A1K2S
0150 0121
CAPACITOR-FXO lUF >80-20% 50WV0C CER
28480
0150-0121
AISC29.C30
0180-4480
2
CAPACITOR. FXO lOPF IDOV
28480
0160-4490
A1SC31
0t60-3946
t
CAPACITOR-FXO 970PF >-I% 50WFVOC PORC
28490
0160 3949
A1SC32
0160-3300
CAPACITOR-FXO 43PF > 5% 300WV0C
28490
0160-2200
AISC33 AS
0160-3988
CAPACITOR-FXO 22UF >-10% 400VOC
28480
DIED 3988
A1«C34
0121-0436
CAPACITOR-V TRMR-AIR 2.4/24 5PF 3S0V
74970
I8S-509 125
A1SC3S
0140 0193
1
CAPACITOR-FXO 82PF >-S% 300WVDC MICA
72138
DM15ES20J0300WVtCR
AIK3S 38 Aa
0160- 306S
3
CAPACITOR- FXO .01 UP *80-20% lOOVOC CER
26460
0160 2055
AIK40 AJ
01U 0128
1
CAP AC ITOR-P X 0 F * - 20% SOOVOC CE R
28490
0160-0128
AIKRI.J.a
1901 0040
DIOOE-SWITCHING 30V SOMA 2N$ 00-35
28490
1901-0040
At&CRA.S
1901-0518
DIQ09- SCHOTT KV
28490
1901-0919
AtSCR6
1901-0040
1
DIODE -SWITCHING 30V SOMA 2NS 00-36
28490
1901 0D4O
At6CR7
1901 0586
2
DIODE. G£N PRP 30V 25MA TO-72
28490
1901’0S66
AiaCRB.CRd
1903-3073
DIODE -2NR 4 32V 6% 00-7 PO-4W TO* ^ 035%
04713
S2 10936-77
At5CRI1-cni3
1901 -0040
DIODE-SWITCHING 30V SOMA 7NS 00-35
28490
1901-0040
AISKt, K3 AA
0490-0683
RELAY-REED lA lOCMA 1000VDC 6VOC-COIL
28490
0490-0683
A^SK2. K4
0490-0663
RELAY -flCEOIA tOOMA tCOOVDC 5 VDC-COIL
28490
0490-0883
AI501
1854-0071
TRANSISTOR NPN Si FD»300MW FT*20CMHZ
28480
18S4 0071
A1SQ2'04
1895-0420
TRANSISTOR J-FET 2N4381 N-CHAN D-MOOE
04713
2N4391
AI&QS
idss^ooe?
1
TRANSISTOR J-FETN-CHAN D-MOOE Si
28480
1955-0062
A1S06
1664-0071
TRANSISTOR NPN 01 PO'30OMW FT>200MH<
28480
16$4- 0071
A1B07
1653-0030
TRANSISTOR PNP $1 P0«300MW FT*160MIU
29480
1853 0020
AIS08
1855-0420
TRANSISTOR J FET 2N4391 N-CHAN 0- MODE
04713
2N4381
A1&09. 01 1
1884-0753
2
TRANSlSTOfl. ADS 16
28460
1854-0753
AI5QI?
1663-0030
TRANSISTOR PNP SI PD.300MW FT-I50MHZ
28460
1653 0020
A160I3
1664-0071
TRANSISTOR NPN Si PD*300MW PT-200MK2
28460
1854 0071
AIEQU
1853-0069
1
TRANSISTOR PNP 2N4617 SI PO-200MW
07263
2N4917
A1SQ15
1^-0315
1
TRANSISTOR NPN SI PD«350UW FT>300MH2
04713
SPS3611
A16Q16
1864-8071
TRANSISTOR NPN Si PD 300UW FT-200MH2
28480
1654 0071
A1SQ17
iK3-0Q20
TRANSISTOR PNP SI PD-300MW FT*ISOMH2
284B0
1653 0020
A1M18
1865-0061
1
TRANSISTOR J-FET 2N5246 N-.CHAN D MODE SI
0129S
2N5245
A1SQ16.020
1885-0420
TRANSISTOR J-FET 2N4301 N-CHAN D-MOOE
04713
2N4361
Aisni
0683 1035
RESISTOR 10K 5% .2SW FC TC> 400.‘-700
01121
C61035
A16R2
0663 3236
RESISTOR 22K 5% .2SW FC TC--4OO/.B0O
01121
C8223S
AI6R3
0683 6146
RESISTOR 510K S% .2SW FC TC>-a00.’>800
01121
CB6145
A1SRA
0683 •2236
RESISTOR 22K 5% 25W FC TC--400.>9IX)
01121
C87235
AISRS
0883 5145
RESISTOR SlOK 6% 25W PC TC« 600 '*900
01121
C9614S
AI5H8-
PADDING LIST
0686-4470
RESISTOR 668K 1% 12SW P
24549
C4 I/S To-«eei F
0767-0444
RESISTOR 12 IK 1% 125W F
24549
C4-l/S-T0'1212-F
0888 4308
RESISTOR 188K 1% 12SW f
24548
C4 1/9-10-1692 P
A1SR7
0757 OU9
1
RESISTOR 20K l%.125WF TC>D>-1IM
03292
w4-t78-TO-849H-F
A1SR8
0888-8892
1
RESISTOR I80K 1% I2SW F TC*0> -75
07718
CEA -993-N330
A1SR9
0668 3262
1
RESISTOR 40 21% 125WF TC>Oi- 100
24548
C4 -1/8-TO 4022-F
AISRIt
0898 3158
1
RESISTOR 26 IK 1% 12SW F TC^ 100
24548
C4-1>8 TO 2612 f
A1$R1?
0663-2466
1
RESISTOR 24M $% 25W FC TC- 800/>1l00
01121
CB2455
A1SR13
0686-3466
1
RESISTOR 267K 1% .129W P TC*<K 100
24649
C4-I/S TO 2873 F
A15R14
0693 1036
RESISTOR 10K 5% 25W FC TC >-400.-700
01121
CB103S
AIBRI6
0883-2238
RESISTOR 22K 5% 25W FC TC- .400/-600
01121
CB2236
AI6R10
2100-3161
RESISTOR TRHR 20K 10% C SIDE-AOJ 17-TRN
32967
3008P-I 203
A1BR17 Ac
2100 3058
RESISTOR -TRMR 5K 10% C SIDE AOJ 17-TRN
03744
3006P 1 502
A15R18 At, AN
0888 8350
RESISTOR 732K1% I25W F TC*0> - 100
03282
MCK 1/8 10 1323 F
A1BR10
0767-0417
RESISTOR 582 1% 125W F TCH3> 100
24549
C4 1/8 TO S82R F
A19R21*
PADOIAG LIST
0683 1645
RESISTOR 180K 5% 2SW FC
01121
CBI848
0683 2245
RESISTOR 220K 5% 25W FC
01121
CB2245
0683 2446
RESISTOR 240K S% 25W FC
01171
C 62445
0663-3046
RESISTOR 300K B% 25W FC
01121
C83045
0693-3646
RESISTOR 360K 5% 2SW FC
01121
C83645
0693-6146
RESISTOR 5I0K 5% 2SW FC
01121
C65145
0883 7545
RESISTOR 7SOK 6% 2&W PC
01121
CB7545
0883 1555
RESISTOR 1 6M 5% 2SW FC
01121
C81555
A1SR22
0767-0401
1
RESISTOR 100 1% 12SW F TC*D«-10D
24548
C4.1/9-T0 lOOn.p
AA SEE NOTE ON KHtMATIC 3
AC SEE NOTEONKHEIAATICS
Aj SEENOTEONKME>iUTIC3.
AL.AN SEENOTEONKHFMATIC3
AP SEE NOTE 0NSCHCMATIC3.
6 It
Table 6-3. Reploceoble Parts(Cent'd)
Reference
Designation
1
HP Part Number
Qty
Description
Mfr
Code
Mfr Part Number
A1SA23
0BS3-IWS
R ISIS TOR 100KS« 3$W PC TC- 400/ *800
01807
C8I(M5
Al$fl34 AQ
0693' 7336
RESISTOR 22K m 26W EC TC* «00/<800
01121
C02336
0M>7Oe3
3
RESISTOR 100K l» T7SW f TC^-2S
03392
NE55
A16A36
06M-4439
RESISTOR 1 6TK l« I25W F TC^ >00
34546
C4- 1/8- TO- 1871- F
AfSR?7
0696 - 3379
RESISTOR 4 99K 1% .126W E TC*0< 100
24546
C4-1/B- TO 4991 0
2100-3161
RESISTOR TRUR 20K I0« C SIDE - AOJ IT TRN
32997
3006P 1 303
AI&A31 AL. an
0696 6350
RESISTOR 732K in IHW F tC'O'-lOO
03292
MC5C-I/8-TO-7323-F
AI&A32
0666 0064
RESISTOR 2 I6K l« 126W E T&HX-lOO
24546
C4 •1/8>T0-215I F
AISR33
one 34*2
RFSlSTOR 3 67K \% 13SW F TCHh-tOO
24546
C4-1/8-TD -3871 F
AISR3«
07B7-04I7
RESISTOR 562 1% I35W P TC«O« t00
34546
C4-1/8 TO 5B2R F
AISR3S
0757 •ozeo
RESISTOR 1R 1% .135W F TC><K 100
24546
C4-1/8-TD 1001 F
AI^A36
06«e 44«0
1
RESISTOR 849 1% .'35W E TC-O*-t0O
03292
C4.ly8-T0 649R F
A(SA37
0663-5109
RESISTOR 51 5% 25MI FC TC* FOO'^SOO
01T31
C8S105
AISR38.R3a
osaa sioe
RESISTOR 51 5% 26W FC TC*-400/*500
01)21
C85105
AI&R41
0/67 04>3
*
RESISTOR 392 t« I26W E TCM)*-100
24546
C4 1/8 TO 392R- F
A1fift42
0609 4479
RESISTOR 1 67K 1% I2SW E TC-0<-t00
34546
C4 1/8- TO 1871 F
A1SM3
0698-4478
1
RESISTOR I0.7K 1% I26W F TC*O*-l00
34546
C4 1/8'TO 1072-D
A16H44
0683-5106
RESISTOR 51 5« 2SW FC TC* 400/*5aO
01131
C95105
A16H46
0688-44Z9
RESISTOR 1J7K 1% I25W P TC<4>« 100
74549
C4 1/8-TD-1671-F
AISH46
06M 4447
1
RESISTOR 380 1% 125W P TC-0*> 100
34546
C4 I'S T0-360R F
AI6R47
0757 0433
RESISTOR 3.33K 1% .129W P TC«O*-100
74545
C4-1/8>T0 3321- F
AISR48
0757 0438
RESISTOR 5 11K \% .125W F TC«O*-100
74646
C4> 1/%-T0'5111* F
AISR49
0696 3379
RESISTOR 4 99IC 1% 12Mr F TC«0* 100
74545
C4-l'8-T0-499t-F
A16R91 Ac
2100-3096
1
RESISTOR TRMR 200 I0« C SIDE
03744
3006P 1 201
A1SRU Ac
0698- 6630
1
RESISTOR 20K 1« I25W F rC‘0— 25
03293
NE55
AI5RS3 Ac
0598 6360
RESISTOR 10K IS I25W F TC-0— 25
03292
NESS
A1SRS4
0606-3431
1
RESISTOR 23.7 IS I75W F TCHh-IW
0386B
PMES5 l/B TO 23R7 F
A)SR»
0696 - 6370
RESISTOR SK IS I25W F TCHH 26
03888
PME55 T9 5001 8
At&RSe
Z100-316I
RESlSTOR-rRMR 30K 10% C SiDE-ADJ 17 TRN
33997
3006P-1 303
A1SRS7.RM
0663 1605
RESISTOR 15 S% 2SW FC TC--40a *500
01131
C6150S
AISBBD E .
0683-1045
3
RESISIOR 100K 6S 25W FC TC
01607
CB1045
AI5R61
0683 1035
RESISTOR 10K » .35W PC TC» ' ^Oa ^TOO
01121
CB1035
A16R62
0757 0417
RESISTOR 562 136W F TC^-100
24546
C4-t/8-T0 S67R P
A15R63
0/57 0487
RESISTOR 825K 1% 13SW f TC^-100
24546
NA4
A1SHS4
0698-6320
RESISTOR 5K IS I25W F TC*<H-2S
03886
PME55' 1i8-T8 *6001 -8
AISR60
3100-3161
RESISTOR-TRUR 20K 10SCSI0E-AOJ I7-TRN
32997
3008P-1-203
Al5H6d AQ
0663-1 63S
RESISTOR I6K SS .25* FC TC*-400T-800
01607
CB1635
A1SRS7 AO
0693-1335
t
RESISTOR I3KSS .25* FC TC'-400i*eOO
01607
CB1335
Aisnes
0663- 1039
RESISTOR 10K 5% 35W FC TC*-400^*700
01131
CB1035
AI5R69
0663-1039
RESISTOR 10K 8% 35W FC TC«>400'«700
01121
CBtan
AI6R7t
0757-
1
RESISTOR 332
A1SR72 ^8
ZIQ0-31Z2
2
RESISTOR-TAMR 100 10% C TOP
03744
3006P 1-101
A15R73
3100-3066
R6SISTOR-TRMR 5K 10% C $l06>AOJ 17-TRN
01885
43P503
A1&R74
2100-3306
REStSTOR-TRMR 50A 10% C &OE-ADJ 17-TRN
32997
3005P- 1 -503
A1SR76 As
210O-3T94
1
RESISTOR-TRMR IK 10% 6 SlOE-AOJ 17-tRK
03744
3006P 1 102
AfSR7fi
0696 878Z
RESISTOR 720K .SS <R/OMATCHED SET R78.BB.91I
76460
0886 07B3
AISR77
0757 0467
5
RESISTOR 635K 1% .135W F TC-0*- 100
24546
KA4
AISR7B AC
0757-0380
RFSiTOR IK 1% 12SW F TC-0* -100
03292
C4- 1/8- TO- 1001 -F
A1SR79
0683 1508
RESISTOR 15 5% .2SW Fc TC--400i*500
01121
C6I505
AtSftBI AU
0696 IMM
3
RESISTOR 5.49K 1% .1W F TC-0^-10
26460
one 8964
AI5R63 AM
0666 B863
1
RESISTOR 169K 1% IW F TC<«-I0
38480
0698 6963
A15RU AM
0698 S965
5
RESISTOR I.97K 1% .1W F TCH>«-10
29460
0608-8965
AISRB4
0757 0433
RESISTOR 332K IS .125* F TC*0* 100
34546
C4-1/8 TO 3321 F
AI&RB6 AM
0698-8966
RESISTOR 634 IS .1* F TC*0*-I0
38480
0608-8966
AI6R8$
0698-B782
RESISTOR I96M 6S IFiQ MATCHEDSEI R78J6.9II
29490
0608-870^
AI&ASe
0683 1605
4
RESISTOR 15 5% 25W FC TC* 40(^*500
01121
CB1505
Aisnn* aa
FADOINC LIST
0696 4306
RESISTOR 16 9KIS ITS* F TC*0* - 100
03393
C4 - 1. *8-10-1 692 -f
0696-3)36
RESISTOR 17 IK 1% I38W F TC«0* - 100
03293
C4 1/8 TO- 1782 F
07S7 0448
RESISTOR I82K1S 125* F TC- 0* -100
03293
C4 V8-TQ-1883 F
0698 4483
RESISTOR 1I*7K 1% 135W F TC*O*-l00
03292
C4-1/8-TO 1873 F
0699-4484
RESISTOR 19 1K IS 175* F TC*0* 100
03292
C4-1/8-TO 1913 P
0757-0449
RESISTOR 20K IS 175* FTC*0* 100
03292
C4 t«8-TO-2003 F
AISR9I
0698 0783
3
RESISTOR SET. WATCHED 2M 6% IP-*Q MATCHfiOSfT
29480
0608 -8787
R76, R80. R911
A16R92
0698 9316
RESISTOR 2M SSIF/OMATCHEOSETR93.R93I
29480
0808 8316
AISR93
069S-B2I6
RESISTOR 30. 2K .5% IP'O MATCHED SET R92. R93I
38480
0888 8219
AISR»<
ZIOO-33II
RESISTOR -TRMR 600 10% C SIDE AOJ 17-TRK
33997
3006P-1-601 300-F
A19RM
0757 3567
1
RESISTOR 909 IS 12SW F TC*0«-100
26480
0757-3S67
AIER96 AA
0898 5540
1
RESISTOR 1 1U 6S 25* FC TO
0)607
CB115S
AISR97 Aa
0883 1046
RESISTOR 100K6% 25WFCTC
01607
CB1045
AI9Ut
I8Z5-0340
1
IC.OPAMPL LF356
38480
■ 928-0340
A19U2
1820 0476
1
ICIM306OFAUF
27014
I M306H
AIBU3, UA AH
1626-0616
3
1C 357 0PAMFT0-99
78480
1626 0510
A1SUB
1830 0471
1C DIGITAL SN7408N TTL HEX1
01295
SN7408N
A16U6
1929-0357
1
ICLF367HOP AMP
37014
LF3S7H
4040 0749
2
EXTHACTOR-PC 50 6LK POL VC .062-BD THKNS
28480
4040-0748
1305-0060
1
HEATSINK SEMICONDUCTOR
28460
1205 0090
1205-0002
1
HEATSINK TO-&^TO-39-PKG
28480
1206-0002
AZO A
1M77-0950I
1
ASSEM61V REFERENCE
AA SEENOTEONSCNEUATIC3.
NOT FIELD REPAIRABLE ORDER
A0 S(( NOTg ON SCHEMATIC 3
REPLACEMENT ASSEMBLY ACCESSORY NO 111779
Ac SEEN0TE0NSCHFMATIC3 ,, .
.1 NOTE ON
«rKFMATir
aS «FNnl?^NVM?«AT ?T «E NOTE ON SCHEMATIC 5.
M HISSuSK^hISmIcI. SEE NOTE ON SCHEMATIC 3
* « db c w • c un own c i V o.
•> 1 : SERIAL NUMBERS l62ZACe?»e ANO ABOVE RERlACESOTBZ-tBBO (S020I
Toble 6-3. Reploceoble Paft$(Cont*d)
Reference
Designation
HP Part Number
Oty
Description
Mfr
Code
Mfr Part Number
CHASSIS MOUNTED PARTS
3l6IM»«e
1
FAN-T6AX DCV
28480
3160-0286
3160-0300
1
FILTER. AIR
28480
3150 030C
ci>ce
0)80-^291
CARACITQR-FXD lUFt 106 36VOC TA
66268
I50O1Q6X6035A2
CRI
1MO-0647
L60-VISIBLE LUM-INT-2MCD IF-20MA-I4AX
2B480
1990-0947
FI
2M0 0701
t
FUSE 2SA 260V SLO-6LO 220/240V OPERATION
76616
3I3.250S
3IIO-0013
t
FUSE 6A 2S0V FAST-6LOI00/120V OPERATION
04703
312.600
6061-1131
2
TERM ASSEMBLY. REAR INPUT
2B460
5061-1131
J2
1260 0063
1
CONNECTOR-RF 6NC FEM SQL-NOLE FR SO OHM
24931
26FR 130-1
J3
1261 3263
1
CONNECTOR: 24-CONT: FEM. M1CRORI86ON
26460
I251-32B3
0380-0643
1
STANDOFF, LG STUOMOUNT (METRIC ThREAOI
004&A
080 *
J4
9100 3010
1
FILTER-LINE
2B460
9100 3810
Ji
6060-7464
TERM ASSEMBLY. fROAT INPUT
26460
5060-7454
PI
t2St 3301
1
CONNECTOR 3 PIN F POST TYPE
27264
09-50 7031
n
136U3067
CONNECTOR 10 PIN F POST TYPE
27264
22-01 2101
F3
1261 4312
1
CONNECTOR 18-PIN P POST TYPE
27264
22-01 2161
1»1 3476
17
CONTACT CONN U/S POST TYPE FEM CRP (P/0 P3I
2B4B0
1751-3476
M
125 1 3277
1
CONNECTOR 4 PIN F POST TYPE
77294
06-50 7041
PS
1261-3276
CONNECTOR e-PIN F POST TYPE
27264
06 50 7051
pe
1261 3276
2
CONNECTOR S-PfN P POST TYPE
27264
06 SO 7051
SI
3100 3380
1
'SWITCH. ROTARY INPUT SELECT
28460
31W 3380
0370 1103
1
KNOB
?M0
0370 1103
3030-0007
1
SCREW-SET 4 40 .12S IN-LG
2S460
3030-0007
S2. S3
3101-0061
2
SWITCH-$1 SPOT-NS UINTR .SA 12SVAC/DC PC
79727
G-124 0013
S«
3101-2043
2
SWITCH-Sl OPOT-NS STD 2A 2S0VAC SLDR LUG
264B0
3101-2042
ss
3101-2042
$WITCH-$L OPOT-NS STD 2A 250VAC SLDR LUG
29480
3101 2042
se
3101-2216
1
SWITCM-P6 OPOT 4A 250V AC
28480
3101 2215
$040-7023
1
PUSH ROO
284B0
5G40 7023
S7
3101-1206
1
SWITCH -P8 OPOT ALTP4G .^A 115VAC PC
28480
3101-1299
0370'0683
1
PUSHBUTTON. OLIVE BLACK
28480
0370 0683
TJ
9100* 0680
1
TRANSFORMER, POWER
78480
9100 0680
U1
1820 -0430
1
IC LM 309 V RGLTR
27014
LVtaOBK
0340 0660
1
IN$ULATQA-X$TR RUBBER RED
8C464
7403 10-02
1200 0456
1
SOCKET-XSTR 2 CONT T1)-3-PKG
28480
1200 - 0456
U2
1826-0181
1
rc LM 323 V RGLTR
27014
LM323K
U3
1826-0117
1
l€ 7812C V RGLTR
07263
7812KC
I200'0479
2
SOCXET-XSTH 2-CONT TO-3 SLOR-TUR
61633
4601
W1
03456-61603
1
CABLE ASEEWdtY. VOLTS
26480
03455 61603
w?
03456-61604
1
CABLE ASSEMBLY. OHM
28480
03455 61604
W3
03466-61606
1
CABLE ASSEM8LY, HP IB (INCLUDES J3 AND P3l
28480
03456-61606
WS
03456 61606
1
CABLE ASSEMBLY. POWER
78480
034S5 61605
XP1
2110-0470
X
FUSEHOLDER-EXTR POST 20A 200V UUIEC
7&ei$
345003-010
6041-0306 4
2
KEY CAP-UNL PTYGRY
28480
5041-0306
6041 -0138
1
KEY CAP- UNL MG I08SI
78480
6041 0130
6041 0318 3
21
KEY CAP-L PTYGRY
28480
5041-0318
6041-0144
1
KEY CAP- 1 MOSGRY
26460
5041-0144
6041 -0267 OA
1
KEY -CAP UNL
26460
5041 0267
6041 0460
2
KEY CAP-L SCABLU
28460
5041-0450
5040 6867
1
LENS. LEO
28460
5040 6697
6041 0376 4a
3
KEY CAP- UNL
7B480
5041 0376
S040-666e
n
LITE PIPE
26460
5040 5686
7120-6410
1
WARNING LABEL 5O-60HZSELECTION
28460
7120-6410
•* SCPfACNU
UetRS 1622A0O411 AND ABC
Ve HEFLAC
:s PARTS S04I-013B ANO S041 ^144
•»A SCflIAL NUUeCfiS 1622A07436 AN0A60VE HCnACSS 034SM>4303
3B SERIAI NU
VIOtRS 1822A05831 AND A8C
VE REPLAC
ES PART 5000 7454
Table 6-3. Replaceable Parts
Reference
Designation
HP Part Number
OtY
Description
Mfr
Code
Mfr Part Number
502>ae»l
■■
•P60NI PKAH£
26460
5020-6601
HU
302k>«M32
sm siKuis
26460
soED-aasE
5020- 0« 92
•466R fHAHt
26410
5020-6602
5060- 9«i5
1UR CUftR
26AB0
506D-9695
5060-9647
60MW COVER
26460
5040-0647
S0t»-«8>»
2
45S06 COVER A9SEA61V
26460
5040-6674
Hft
5060-9«04
2
5fR6P HANDLE e 11*
26460
5040-6604
H¥%
>040-7219
2
5TRAP HANDLE a CAP# FRON1
26410
9040-7216
H?H
ilt*^UZ9
6T«AP HANDLE • CAP* REAR
26460
5040- 7220
HPUt
5040-7204
pool
2BAB0
5040-7201
HPli
14«0-1M>
MilCFUWI >>16 SSt
26460
1440-1945
HPiZ
>001- 0436
TMIM »IMP
26460
soat-OATa
5U40-7202
iRlNf TOP
26410
S0AO-TE02
HPlh
0J455-O4i02
PANEL. FUMi. cncss
26460
03455-04902
A»»4»
09455-00204
MM'FAHiL. FMWt
26460
OJBSB-OUOA
NPi6
41 14-0644
•■INOUN OISPIAT
26460
4114-0441
Hfil
03*S»-0U40t
OUARO ASSEN6LV
26460
O34SS-SM0I
APIA
0i455-00401
OUARDv NAIN
26460
03455-00101
0409-0141
MIJE-FC *0 aiA PDLVC .0A2-eD-lHKNS
26460
0409-0141
04 09-0152
2
eUI»E-FV BD BLN POL VC .OB2-BO-THKNE 1-LC
26460
0409-01 52
1400-0574
1
nOCRINO 6IRAP
26460
1400-0574
AP49
uJU3-m)10j
1
CiMBD. ilUE
2BAB0
03A33-0010E
MnO
0405 0162
03466 -00603
1
GUIDE-PC BO BIK POL VC On-BO-THKNS l-LG
SHIELD, *.C CONVERTER
26480
26460
0403 OIK
034»-00e03
AP^I
OJ455-V1203
BBACAET. FT TEU
26460
03433-01203
034SS-08IOT
1
COVER. V0LIA6E hEGULATOR
26460
03433-0410T
H9Z»
09455-01201
1
MACRETt REE6RENCE
26460
03433-01201
HP^4
04 09-0141
09455-00602
i
COIOE-PC eO 6LR PQUC .062-60- IHRN 5
9HIEL0. LT ISOLATOR
26460
26460
0409-01 41
09455-00402
AP^>
09455-04102
1
COVER. SOItGH 60
ZBABB
09455-04102
MP^«
09455-04101
1
COVEB. TOP CD (AVERAGE AC CONVERTER)
26460
09455-04101
0 9 455-04106
1
CDVEB. TOP CUAROIRUS AC CONVERTER)
26460
09495-04106
09495-04106
1
COVER. AC CAL
26460
09455-04104
a»4ss-ouo*
i
MUUVTJNC 6HACR6T. 0UT6D
26460
03433-01204
09455-01101
1
HEAl SINR
26410
09455-01101
09455-00109
1
CVSSEI
2BABD
09455-00109
Sri4o-8oai
4
INSULATOR. SLIDE
26460
5040-6081
09455-04901
1
PLATE. SLIDE
26460
09495-04901
09455-00601
1
COVER* LINE
26460
09455-00401
HPi3
09455-01202
1
6RACRET. TRANSFORMER
26460
05455-0UQ2
HFik
09455-00301
1
PANEL ASSEHNLV. REAR
26460
09455-00901
KPi»
09455-04109
1
OUOB. BEFERENCE
26460
03433-041 03
1940-024?
1
PASTE HER-CPTVE SCR ASST PANEL TWINS
26460
1390-024T
6 19/B70
Model 34S5A
Section Vll
SECTION VII
MANUAL CHANGES
7-1. INTRODUCTION.
7-2. This section of the manual normally contains informa-
tion necessary to adapt this manual to instruments for
which the content does not directly apply. Since, at this
printing, the manual does apply directly to instruments
having serial numbers listed on the title page, no change
information is given here.
7-1/7-2
Model 3455A
Section VIII
SECTION VIII
SERVICE
B-1. INTRODUCTION.
8-2. This section contains theory of operation, trouble-
shooting procedures, safety considerations, and general
service infomation for the Model 34SSA Digital Volt-
meter.
8-3. SAFETY CONSIDERATIONS.
8-4. Although this instrument has been designed in accor-
dance with international safety standards, this manual
contains information, cautions, and warnings which must
be followed to ensure safe operation and to maintain the
instrument in safe operating condition. Service and adjust-
ments should be performed only by qualified service
personnel.
8-5. Any adjustment, maintenance, and repair of the
opened instrument while any power or voltage is applied
should be avoided as much as possible, and, when inevit-
able, should be carried out only by a skilled person who is
aware of the hazard involved.
WARNIN^
Any interruptiun of the protective grounding
conductor {inside or outside the instrument) or
disconnection of the protective earth terminal
is likely to make the instrument dangerous
Intentional interruption of the protective
grounding conductor is strictly prohibited.
8-6. It is possible for capacitors inside the instrument to
still be charged even if the instrument has been discon-
connected from its power sources.
8-7. Be certain that only fuses with the required current
rating and of the specified typed (normal blow, time delay,
etc.) are used for replacement. Tlic use of repaired fuses
and the short-circuiting of fuse holders must be avoided.
j«arnin£^
The service information presented in this
manual is normally used with the protective
covers removed and power applied to the
instrument. I'nergy available at many points
may, if contacted, result in personal infury.
8-8. RECOMMENDED TEST EQUIPMENT.
8-9. Test equipment required to maintain the Digital Volt-
meter is listed in Table 1-3. Equipment other than that
listed may be used if it meets the listed critical specifica-
tions.
Figure 8-1. Function Block Diagram.
8-1
Section Vllt
Model 3455A
THEORY OF OPERATION
8-10. INTRODUCTION.
8-11. The following paragraphs contain both agcneraland
detailed description of the methods and circuits used in the
Model 34S5A Multimeter. The general description explains
the basic purpose of each block of the functional block
diagram shown in Figure 8-1. The detailed description
describes the methods and pertinent circuitry used to
accomplish the function of each block of the detailed block
diagram.
8-12. INPUT SWITCHING AND DC ATTENUATOR.
8-13. General.
8-14. The front or rear input terminals of the 34SSA arc
selected by a two-section rotary switch located on the
rear panel of the instrument. Reed relays are used to per-
form all internal input switching where voltages greater
than 17 volts may be encountered. All other input switch-
ing is done with FF.T switches.
8-15. Detailed Description.
8-16. Refer to Figure 8-2. Simplified Input Switching E)ia-
gram. The front or rear inputs for ‘'Volts”, “Ohms” and
"Guard” are selected by rear panel switch SI. Relays K3
and K9 connect the Ohms Converter to the "Ohms Signal”
terminals. Relays K2 and K4 are used to convert the Multi-
meter from 4-wirc to 2-wire ohms measurement capability.
The "Input" terminals are connected to the dc preampli-
fier input on the .1 V dc thruugli 10 V dc and all ‘Ohms”
ranges by relay K1 and FFT switch Ql. Relay KS connects
the input to the operational attenuator on the 100 and
1000 V dc ranges. Output of the Attenuator is connected
to the input of the dc preamplifier by FET switch 01 S on
the 100 V dc range and by FET switch Q16 on the 1000 V
dc range. The AC Converter output is connected to the dc
preamp input by FET switch Q3.
8-17. Operational Attenuator.
8-18. The Operational Attenuator provides a fixed attenu-
ation of 10-to-l on the 100 V dc range or IOO-to-1 on the
1000 V dc range. Figure 8-3 shows a simplified diagram of
the attenuator. The circuit operates as a conventional oper-
ational amplifier with fractional gains of .1 and .01. A gain
of I is selected by FET switch Q38 when the attenuator is
not in use. The amplifier input is protected from overload
by diodes CR27 and CR28. Output of the amplifier is
limited to approximately plus or minus 17 V dc by protec-
tion diodes CR29 throu^ CR31.
8-19. AUTO CALiBRATION-DC VOLTAGE.
8-20. General.
8-21. The purpose of the Auto Calibration sequence is to
eliminate offset and gain errors which may he present in the
8-2
Figure 8-2. Simplified input Switching Diagram.
Model 3455A
THEORY OF OPERATION
Section VIII
Figure 8-3. Operational Attenuator Diagram.
analog circuitry of the Voltmeter. This is accomplished by
measuring the offset and gain errors and mathematically
correcting for them. Each error measurement is stored in
“memory” by the main controller as a constant. These
constants are sequentially updated. The output reading of
the Voltmeter is computed by the Main Controller and is
equal to the ratio of the external input to the internal refer-
ence, times a range factor. Figure 8-4 shows a very basic
diagram of the Voltmeter.
A basic equation describing a measurement of one of the
three inputs is: V( ) = (E( ) + Eq)G ; where V( ^ is the par-
ticular output, E( ) is one of the three inputs. Eq is the
internal offset error, and G is the circuit gain. Closing
switch SI applies the internal reference voltage. The circuit
output would be: Vjef = (Eref * ^O) offset error is
measured by closing S2, grounding the input. The resultant
output would be Vg = EqG. Measurement of the external
input would yield Vjn = (Ejn + EoX*- The equation describ-
ing the Auto-Calibration is:
Output Reading® _ fh ' x Kr
Yref' Yq
Substituting the basic equations into the Auto-Cal
equation would yield:
Output Reading = Eq) G • EpC
(Etef * Eg) G - EgG
This equation reduces to:
Output Reading ® x
Eref
or: the output reading is equal to the ratio of the
8-3
Section VIII
THEORY OF OPERATION
Model 3455A
external input voltage to the internal reference volt-
age times the range factor (Kf).
8-22. Circuit Description.
8-23. Figure 8-S shows a simplified schematic of the auto-
cal switching circuitry. The following paragraphs describe
circuit operation for the various auto-cal measurements.
8-24. 10 V dc Input Offset Error Measurement. Figure 8-6
illustrates the circuit configuration for making the 10V dc
Figure 8-€. 10 V dc Input Offset Error Measurement.
8-4
Model 3455A
THEORY OF OPERATION
Section VIII
Offset Error Measurement. The DC Preamp input is
grounded through a 100 kjlohm resistor by FET switch
AI0Q2. A DC Preamp gain of XI is selected by FET switch
A10Q19. The resultant measurement is the offset voltage
present on (he 10 V dc range. This number is stored by the
main controller for use in correcting measurements made
on the 10 V dc range.
8*25. 1 V dc and .1 V dc Input Offset Error Measurensent.
Offset error measurements on the 1 V dc and . 1 V dc ranges
arc made in the same manner as the 10 V dc range except
for IX Preamp gains of XIO for the I V dc range and XI 00
for the .1 V dc range. The circuit configuration for the I V
dc Offset Error Measurement is shown in Figure 8-7. A DC
Preamp gain of XIO is selected by FET switch A10Q2I.
Figure 8-8 shows the circuit configuration for making the
.1 V dc Offset Error Measurement. In this case, the feed-
back path for the DC fVeamp is through Amplifier A10U3,
which has unity gain. FET switch Q27. the precision 10-to-
1 divider (A 1 1 R7 and A 1 1 R8) and FET switch A I OQ 1 8 for
a gain of 100. The resultant measurements arc stored by the
main controller to correct measurements made on (he .1 V
dc and I V dc ranges.
8-26. 100 V dc and 1000 V dc Input Offset Error Measure-
ment. On the 100 V dc and 1000 V dc ranges the input of
the operational attenuator is grounded through a 100 kil-
ohm resistor by relay A10K6 and FET switch A10Q34 (see
Figure 8-9). On the 100 V dc range, the feedback of the
operational attenuator is selected by FET switch A10Q3S
(attenuation of 10-to-l). The output of the operational
attenuator is applied to the input of the DC Preamp
throu^ FET switch AIOQIS. Attenuator feedback on the
1000 V dc range is selected by FET switch A10Q39 (atten-
uation of 100 to 1) and is applied to the DC Preamp input
through FET switch A10QI6. DC Preamp gain is XI for
both error measurements.
8-27. 10 V dc Gain Error Measurement. On the 10 V dc
range the gain error measurement is made by applying the
internal reference voltage (-*- 10 V dc), throu^ a 100 kil-
ohm resistor and FET switch A1004, to the input of the
DC Preamp (see Figure 8-10). A EX Preamp gain of XI is
selected by FET switch A10Q19. The measurement result
is stored by the main controller as the 10 V dc full scale
constant.
8-28. .1 V dc and 1 V dc Gain Error Measurement. On the
1 V dc range, the reference voltage is applied to the DC Pre-
amp input through the precision ten-to-one divider (AI 1 R7
and R8)by FET switches A10Q31 and A10QI6(sec Figure
8-11). The lower end of the ten-to-one divider is held at
virtual ground by closing FET switch AI0Q38. Output of
the ten-to-one divider is I V dc. A DC Preamp gain of XIO
is selected by FET switch A10Q21. The measurement result
is stored by (he main controller as the I V dc full scale
constant.
8-29. A separate gain error measurement is not made for
the .1 V dc range. Since the only difference between the
1 V dc and .1 V dc circuit configuration is a precise gain of
ten, the .1 V dc gain error constant is computed by the
main controller.
8-5
Section Vlll
THEORY OF OPERATION
Model 3455A
8-30. 1 V dc Reference Offset Error Measurement. Since separate offset Error measurement is made to include any
the I V dc full scale reference was derived by dividing the offsets present in the ten-to-one divider and associated
internal reference by the precision ten-to-one divider, a circuitry. Figure 8-12 illustrates the circuit configuration
Measurement.
8-6
Model 345SA
THEORY OF OPERATION
Seciion VIII
for the I V dc Reference Offset Error Measurement. The 8-31. 100 V dc and 1000 V dc Gain Error Measurement,
input of the DC Preamp is grounded through the len-to-onc Figure 8-13 shows the circuit arrangement for making the
divider by FET switch AI0Q16. Preamp gain is XIO. 100 V dc gain error measurement. The reference voltage is
Figure 8-1 1. .1 V dc ar>d 1 V dc Gain Error Measurement.
Figure 8-12. 1 V dc Reference Offset Error Measurement.
8-7
SecUon VIII
THEORY OF OPERATION
Model 3455A
connected to the input of the operational attenuator is connected to the E>C Preamp input by FET switch
through FET switch A10Q33 and relay AI0K6. The attenu- A10Q15. A DC preamp gain of XIO is selected by FET
atur is set to a gain of 0.1 (10 to I attenuation) by FET switch AI0Q21. The measurement result is stored by the
switch AI 0Q3S. The output of the operational attenuator main controller as the lOO V dc gain error constant.
Figure 8-13. 100 V dc and 1000 V dc Gain Error Measurement.
Figure 8-14. 100 V dc Reference Offset Error Measurement.
8-8
Model 34SSA
THEORY OF OPERATION
Section VIII
8-32. A separate gain error measurement is not made for
the 1000 V dc range. Since the only difference between
the 100 V dc and 1000 V dc circuit configuration is a
precise attenuation difference of 10, the 1000 V dc gain
error constant is computed by the main controller.
$•33. 100 V dc Reference Offset Error Measurement.
Since the reference voltage for the 100 V dc range is
divided by the operational attenuator; a separate offset
error measurement is made to include any offsets which
might be associated with the attenuator and FbT switches
used. Figure 8-14 illustrates the circuit configuration for
this measurement.
8-34. AUTO-CALIBRATION -OHMS.
8-35. General.
8-36. During the ohms function the ohms converter sup-
plies a current through both the unknown resistance and
the reference resistance (see Figure 8-15). Since the same
current flows through both resistors, their respective volt-
age drops are proportional. As with the CC Auto-Cal
sequence, the offset errors are measured and subtracted
from the unknown and reference resistance measurements.
The voltage developed across the unknown resistor is mea-
sured by closing SI while the reference voltage, developed
across the reference resistor, is measured by closing S2. The
value of the unknown resistance is computed by the main
controller. An equation describing this computation is:
-HVRx + 6o>Gi -EoGil
R„ Kr
IVrEF * Eol G2 - Eo Ga
Figure 8-15. Basic Ohms Measurement Diagram.
where Rx is the unknown resistance value, V(^x is the volt-
age drop across the unknown resistance, V|^ ref. is the volt-
age drop across the reference resistance, is (he input
offset error. G| and G 2 are the circuit gains of the particu-
lar measurements, and fCr factor. This equation
simplifies to:
, VRx Cl
VreF G2
Kr
8-37. Circuit Description.
8-38. .1 kn, 1 kf2, 1 Mf2 Offset Error Measurements. The
offset error constants derived for the .1 V dc and I V dc
ranges are also used for the .1 kf7, 1 kfl, and 1 Mf2 offset
error constants, since the circuit configurations are the
same. Refer to Paragraph 8-25 for a description of these
offset error measurements.
8-39. 10 kn, 100 kn, 10 Mn Offset Error Measurements.
Two additional offset measurements are made to compen-
sate for errors which might be present when making mea-
surements on the 10 kn, 100 kn, or 10 Mn ranges. Figure
8-9
Section VIII
THEORY OF OPERATION
Model 3455A
Figure 8-17. Ohmt Reference Meaiurement.
Notei: VOLTAGE LIMITED TO 5 V. FET Switch A10Q13. The reference is measured prior to
8-16 illustrates the circuit configuration for these measure- each measurement of the unknown resistance,
ments. The DC Preamp input is grounded through a 100 kf2
resistor by FET switch A10Q2. The feedback path for the 8-41, 100 1 10 Mf2 Reference Measurements. On
X2 gain is through FET switches A10Q22 and A10Q21. the 100 kJ2 range, AI0K7 is opened and the .7 mA current
Feedback for X20 gain is through A10Q22, isolation amp- source is applied to the combination of R1 and R5 (1 M£2).
lifier AI0U3, switch A10Q27, the precision 10-to-l divider The reference voltage developed across R1 and R5 is ap-
and switch A10Q18. A separate measurement is made for plied to the DC Preamp input through FET switch
both gains and the results are stored by the main controller. A10Q14. On the 1 MJ2 and lOMD ranges, relay A10K8 is
8-40. .1 kSl, 1 kn. 10 kf2 Reference Measurements. The ‘^e .7 M current source is applied to the 1 Mfi
ohms reference voltage is developed across the reference reference resistance. The reference voltage is applied to
resistance. On the .1 kfi through 10 kfl ranges the refer- ^ Preamp input through A10Q14.
ence resistance is I kJ2 (see Figure 8-17). The .7 mA
current source is connected to the I kJ2 reference through 8-42. AUTO CALIBRATION— A/0 CONVERTER,
relay A10K7. The 999 kfi reference resistor is shorted
by the combination of relay AI0K7 and AI0K8. The refer- 8-43. Two Auto-Cal measurements are made to correct
ence voltage is applied to the DC Preamp input through errors which might be generated in the A/D Converter. One
Figure 8-18. Simplified A/D Converter Diagram.
8-10
Model 34SSA
THEORY OF OPERATION
Section VIII
measurement is made to correct for offsets. The second
measurement is made to conect for any difference between
the plus and minus "run-down” current references.
8-44. Circuit Description.
8-45. Offset Error Measurement. Figure 8-18 shows a
simplified schematic of the A/D Converter. During the
offset error measurement all input switches to the inte-
grator are opened. During the integration period, the inte-
grator is permitted to charge to a voltage equal to any off-
set current present in the integrator circuit. At the end of
the integration period the integrator is "run-down” and
the offset digitized and stored as the A/D Converter offset
error by the main controller.
8-46. Current Ratio Measurement. During the current
ratio measurement the plus and minus references are
applied to the input of the integrator through diode switch
Uld and U2d. The references are switched at a 1 milli-
second rate during the integration period (133 milli-
seconds). At the end of the integration period, the accumu-
lated charge on the integrator is “run-down” digitized and
stored as the current ratio constant. The purpose of this
measurement is to correct for any imbalance between the
positive and negative current references.
8-47. TRUE RMS AC CONVERTER.
848. General.
8-49. The rms converter uses operational circuitry, rather
than a thermal element, to convert the ac signal to a dc
level equivalent to the rms value of the input signal. Use of
the operational rms converter permits faster ac measure-
ment rates. The frequency range of the true rms converter
is 30 Hz to 1 MHz during normal operation and 300 Hz to
1 MHz during fast ACV operation. Full scale output of the
rms converter is 6.6667 V dc. Figure 8-19 is a simplified
schematic of the true rms converter. The mathematical
expression de scribing the measurement of an rms level is
V output = >/ V in ‘ which states that the output voltage
(Vo) is equal to the square root of the average of the abso-
lute value of the input voltage (Vip) squared. The circuitry
used in the rms converter solves for the expression
which is identical to
8-SO. Circuit Description.
8-51. AC Input Attenuator. The Input attenuator of the
rms converter is an RC circuit which provides a fixed
attenuation of 100-to-l on the 100 V ac and 1000 V ac
ranges. Attenuator switching is performed by reed relays
which are controlled by the inguard controller.
8-52. Input Amplifier. An operational amplifier with fixed
gains of xl and xO.l is used as the input amplifier. The
combination of amplifier gain and input attenuation are
used to maintain a full-scale output of 1 V rms from the
input amplifier. Table 8-1 shows the input attenuation and
amplifier gain combinations used on each range.
Table 8-1. AC Converter Ranging.
Voltage
Range
Input
Attenuation
Factor
Ampliiier
Gain
Total
Cain
1 V
1
1
1
10 V
1
0.1
0.1
100 V
.01
1
0.01
lOOOV
.01
0.1
0.001
8-53. Absolute Value Amplifier. The absolute value ampli-
fier, as the name implies, solves for the absolute value of
the signal input to it. The operation of this circuit is similar
to a full wave rectifier. That is the negative portion of the
signal is inverted and combined with the positive portion.
The resultant positive signal is applied to the input of the
squaring amplifier.
8-11
Section VIII
THEORY OF OPERATION
Model 3455A
8-54. Squaring Amplifier. The squaring amplifier is a log
amplifier circuit which takes the log of the input voltage, or
in this case since there are two transistors (Q9 A and QUA)
in the feedback loop, takes twice the log of the input
voltage. Therefore, the output of the squaring amplifier is
equal to 2 log I V in I or log 1 V in I * .
8-55. Square Root and Averaging Amplifier. The square
root amplifier reverses the action of squaring amplifier.
The input to the amplifier is through logging transistors
QllB and Q9B. Output of the square r oot ampli fier is
equivalent to 1/2 log IV in I* or log V ■ V In I ^ . The
operations of the square root amplifier and the averaging
amplifier are simultaneous and inter-dependent. The com-
bined output of the two circuits is a dc level proportional
to the rms value of the input signal.
B-S6. AVERAGE RESPONDING AC CONVERTER
(Option 001).
8-57. General.
8-58. The average ac converter is an average responding cir-
cuit calibrated to the rms value of a sinusoidal input. Full
scale output of the converter is 6.6667 V dc for all ranges.
Figure 8-20 shows a simplified schematic of the converter.
8-59. Circuit Description.
8-60. AC Input Attenuator. The ac input attenuator is an
RC circuit which provides a fixed attenuation of 100-to-l
on the 100 V ac and 1000 V ac ranges. Attenuator switch-
ing is done by reed relays which are controlled by the
inguard controller. Input resistance of the AC Converter is
approximately 2 megohms.
8-61. Converter Amplifier. The converter amplifier uses a
dual FET input stage to maintain a high input impedance.
An operational amplifier provides the necessary gain to
drive the output stage of the converter amplifier. The out-
put stage of the amplifier is a current driver circuit. Two ac
feedback paths provide fixed gains of 1 or 0.1. An integrat-
ing amplifier (U4) is used to maintain a dc level of 0 V dc at
the output of the Converter Amplifier. The integrating
amplifier also determines the low frequency cut-off point
of the Converter Amplifier. (The cut-off frequency is ap-
proximately 300 llz on the FAST ACV mode and 30 Hz on
the ACV mode.) A diode protection circuit is used to limit
the output of the Converter Amplifier to approximately
± 6 V peak to prevent saturation of the amplifier.
8-62. AC Ranging. AC ranging is accomplished by attenu-
ating the input signal and changing the gain of the converter
amplifier. The input attenuator provides a fixed attenuation
of 100 to 1. The Converter Amplifier has fixed gains of 1
or 0.1. Table 8-1 shows the various combinations of amp-
lifier gain and input attenuation necessary for the input
voltage ranging. Full scale output of the Converter Amp-
lifier is approximately 1 volt rms for all ranges.
8-63. Rectifier and Filter Amplifier. The output of the
Converter Amplifier is applied to a rectifier circuit which
produces both a positive going and a negative going half-
wave rectified signal output (sec Figure 8-20). The rectified
signals are summed to provide ac feedback for the Con-
verter Amplifier. The Filter Amplifier has a fixed gain of
approximately 6.6. The feedback circuitry of the Filter
Amplifier provides one pole of filtering. The output of the
Filter Amplifier is applied to a one pole RC filter network
for FAST ACV operation and a two pole RC filter network
for ACV operation.
Figure 8-20. Simplified Average Responding AC Converter.
8-12
Model 34SSA
THEORY OF OPERATION
Section Vlll
8-64. Output Buffer Amplifier. An Operational Amplifier
with unity gain is used to isolate the output of the AC Con-
verter. Full scale output of the AC Converter is + 6.6667 V
dc for all ranges.
8-65. OHMS CONVERTER.
8-66. General.
8-67. The Ohms Converter is a voltage limited current
source which supplies a constant current through the
unknown and reference resistors until the output voltage
reaches approximately 4.7S volts dc. At this point the con-
verter becomes a constant voltage source. During the cur-
rent mode of operation the converter supplies a constant
current of .7 mA on the 100 ohm through 100 kilohm
ranges or .7 microamps on the 1 and 10 megohm ranges.
The converter becomes a constant voltage source when
measuring resistance greater than S.8 kilohm on the 10 and
100 kilohm ranges and greater chan 5.8 megohm on the 10
megohm range. Since the same current flows through both
the unknown resistance and the reference resistance, the
voltage drops across them are directly proportional. The
unknown resistance value is the ratio of the voltage drop
across the unknown resistance times circuit gain to the
voltage drop across the reference resistance times circuit
gain multiplied by the range constant ; or
Vref G2
8-68. Circuit Description.
8-69. Ohms Converter Power Supply. An inverter circuit
is used to derive power for the ohms converter. The inverter
operates at a frequency of 30.72 kHz on 60 Hz operation
or 2S.6 kHz on 50 Hz operation. Transformers AlOTl and
AI2T1 provide complete isolation of the ohms converter.
8-70. Current Source. Figure 8-21 shows a simplified sche-
matic of the current source used in the ohms converter. The
circuit is designed to provide an output current of .7 mA or
.7 pA. Output current is determined by resistors R3, RS,
and R6. During the .7 mA mode of operation, (100 ohm
through 100 kilohm ranges) relay K8 shorts resistor R3.
The output current is then determined by R6 and is equal
to the reference voltage (+ 6.2 V) divided by the resistance
of R6, or l<j = 6.2/8.87 K = .7 mA. During the .7 pA mode
of operation. (1 megohm and 10 megohm ranges) both K7
and 1C8 ate open. Resistors R5 and R6 form a divider which
divides the + 6.2 V reference to + .7 V. The output current
is now determined by the .7 V across R3 or Iq = .7 V/1 M
= .7 pA. Operational Amplifier U1 drives output transistor
Q4 and provides the gain necessary to maintain the proper
output current. Relay K7 is used to select a reference
resistance of 1 kilohm for the . 1 kilohm through 1 0 kilohm
ranges or I megohm for the 100 kilohm through 10
megohm ranges. Both the reference resistance and the
unknown resistance are in the feedback circuit of the
operational amplifier.
Figure 8-21. Ohms Converter Current Source.
8-13
Section VIIl
THEORY OF OPERATION
Model 3455A
8-71. Voltage Limit. Figure 8-22 shows a simplified sche-
matic of the voltage limit circuit used in the ohms con-
verter. During the current mode of operation the non-
inverting input of U2 is positive, as referenced to ohms
ground. In this mode the positive output of U2 is blocked
by CRM, making the voltage limit circuit inoperative. As
the resistance of Rx is increased the coUector voltage of Q4
becomes more negative. This change is coupled to the non-
inverting input of U2 through the voltage divider composed
of RI4 and R23. As the input of U2 approaches 0 V the
output reverses polarity and forward biases CR14. At this
point U2 takes control of output transistor Q4 and main-
tains a constant voltage of approximately - 4.7 V dc at the
collector. During the time the ohms converter is in the volt-
age limit mode, transistor Q3 supplies the feedback neces-
sary to balance the current source circuit (see Figure 8-21).
The converter operates as a voltage source when measuring
resistances greater than S.8 kilohm on the 100 ohm through
100 kilohm ranges and greater than 5.8 megohm on the 1
megohm and 10 megohm ranges.
8-72. Overload Protection. The ohms converter is pro-
tected from the accidential application of high voltage to
the ohms terminals by diodes (TRl. CR2. CRl 1 and CR12.
These diodes provide a current path through R23 and the
ohms reference resistance to dissipate the applied voltage.
High voltage diode CR8 prevents current flow through Q4
when a negative voltage is applied to the “High" ohms
terminal. High voltage transistor Q4 is biased ofT to pre-
vent current flow when a positive voltage is applied.
8-73. DC PREAMPLIFIER.
8-74. General.
8-75. The DC Preamplifier provides the necessary isolation
and amplifidation of signals from the dc input, ac or ohms
converter, and Auto Cal circuits for use in the A-to-D Con-
verter. The DC Preamplifier is designed to provide high
input impedance and linear gain characteristics.
8-76. Circuit Description.
8-77. Input Circuit. A dual FET(Q17) is used as the input
to the DC Preamplifier to provide high input impedance.
The sources of Q17 are driven by a current source (Q24) to
maintain linear circuit operation. Operational amplifier U2
provides the gain necessary to drive the output circuit of
the preamplifier.
8-78. Output Circuit. The output circuit of the DC Pre-
amplifier consists of an amplifier (Q7 and Q8) and a current
source (QI2). Operation of the output amplifier is similar
to that of an inverting operational amplifier with a gain of
approximately 30 (see Figure 8-23). The amplifier controls
the output by shunting current from the current source.
The output circuit drives the DC Preamplifier feedback cir-
cuitry and the A/D Converter.
8-79. Feedback Circuit. The feedback circuitry for the DC
Preamplifier consists of two 10-tu-l resistive dividers, a
bulTer amplifier, and FET switches. Figure 8-24 shows a
simplified schematic of the feedback circuitry and lists the
various switch closures necessary for the particular pre-
amplifier gains. Buffer Amplifier U3 is a precision XI Amp-
lifier used to isolate the output divider from the precision
10-to-l divider.
8-80. Overload Protection. The preamplifier circuit is pro-
tected from saturation by diodes CR4 and CRS. These
diodes limit the voltage difference between the drains of
Q17. The output of the preamplifier is limited to approxi-
mately t 17 V by Zener diode CR7 and diode CR6 clamp-
ing the output stage of U2.
8-81. Switch Bias Amplifier. The switch bias amplifier sup-
plies a gate bias voltage for the FF.T switches to make the
gate-to-source voltage equal to zero during the time the
FtT switches are ON. The bias amplifier has a unity gain
and uses an FET input to prevent loading of the input
signal. Output of the bias amplifier is coupled through 100
kilohm reistors to the gates of the input switching FET's.
8-14
5
Section Vlll
THEORY OF OPERATION
Model 3455A
Figure 8-25. Simplified Voltage Reference Diagram.
8-82. REFERENCE ASSEMBLY.
8-83. General.
8-84. The reference assembly for the 3455A contains the
components and adjustments for the ohms converter refer*
ence resistance, the precision cen-to-one divider, and the
+ 10 V dc reference voltage. The reference assembly is
designed to be removed from the Multimeter for calibration
and contains all adjustments for the DCV and OHMS func-
tions.
8-85. Circuit Description.
8-86. The ohms reference circuit is an adjustable resistive
network which supplies a precise 1 kilohm or I megohm
reference. The precision ten-to-one divider is an adjustable
resistance divider used to produce the 1 volt reference volt-
age and a precise ten-to-one division for use in the opera-
tional attenuator and DC preamp feedback circuitry. Figure
8-2S shows a simplified diagram of the reference voltage cir-
cuit. The reference for this circuit is a package which con-
tains a reference diode and heater plus associated circuitry.
An operational amplifier (U2) provides the necessary gain
to supply a stable -t- 10 V dc output. Resistors Ra and Rb
form a voltage divider to provide the proper feedback for
the operational amplifier. These resistors are a fine-line cir-
cuit contained in an IC package and are composed of the
basic resistances plus padding resistors to match the divider
to the particular reference diode. Resistance Ra also
includes a potentiometer which is used as the “fine” adjust-
ment for calibrating the + 10 V dc output. The circuit is
returned to the • 15 volt supply to reduce ground currents.
8-87. ANALOG-TO-OIGITAL CONVERTER (A/D).
8-88. General.
8-89. The 34SSA Multimeter uses a multi-slope integration
technique to convert analog input signals to digital informa-
tion. This method permits relatively high speed, high accur-
acy measurements. The following explanation of the A/D
Converter operation uses the integrator output waveform
pictured in Figure 8-26. The waveform shown is for a nega-
tive input voltage. For positive inputs the integrator output
would range between 0 and - 10 volts. This waveform can
be divided into three major portions: the integration period
(lime Ti), the run-down period (time T2) snd the auto-zero
period (lime T3). During time Tj , the input voltage is inte-
grated and the most significant digits of the output reading
are determined. During time T2 the input voltage is re-
moved and the charge remaining on the integrator capacitor
is used to determine the least significant digits of the
output reading. During time T3, the integrator is reset to
approximately 0 volts and readied for the next reading. At
time T0, the input voltage from the DC Preamp is applied
to the A/D converter and causes the integrator capacitor to
charge (period tci ). The rate at which the integrator capac-
itor charges depends upon the amplitude of the input volt-
age applied (see Figure 8-27). If the voltage at the output of
the integrator reaches plus or minus 10 volts the 10 V com-
parator is enabled and interrupts the inguard controller.
The controller switches in a reference current opposite in
polarity amount of time (period td) and causes the inte-
grator to discharge. At the end of period td, the reference
voltage is removed allowing the integrator to again charge
(period tc). This charge, discharge sequence may be
repeated throughout integration period T].
8-90. The period during which the digital counters are
“counting” occurs during the td cycles. The total number
of “counts” is therefore dependent upon the number of td
8-16
Model 3455A
THEORY OF OPERATION
Section VIII
Figure 8-27. Integrator Output Waveforms for Oifferettt Input Voltage Levels.
cycles. The number of charge-discharge cycles depends
upon the input voltage applied (as shown in Figure 8-27)
and whether the voltmeter is in the S or 6 digit readout
mode. For the 5 digit mode, time Ti, is 1/60 second (1/SO
second for SO Hz operation) and approximately 16 charge-
discharge cycles occur for a full scale input. During 6 digit
operation, time Ti is increased to 8/60 second (8/50
second for SO Hz operation), allowing approximately 127
charge/discharge cycles to occur for a full scale input.
8-91. At the end of time Tj, the input voltage is removed
and the reference voltage applied. The integrator is quickly
discharged at a fixed rate to approximately 0.2 volts
(period tf). During period the discharge rate is slowed to
allow accurate zero detection (point of complete dis-
charge). This type of run-down permits both speed and ac-
curacy. The “counts” accumulated during the run-down
period (T 2 ) are scaled and added to those made during time
T 1 for the final measurement.
8-92. Circuit Description.
8-93. Input and Reference Switching. The A/D input and
reference switching is controlled by the inguard controller.
The input from the DC Preamp is applied to the integrator
input through a 19.8 kilohm resistor (RiS) and FET switch
Q3. The integrator charge current due to the input voltage
is established by RIS and is equal to the input voltage
divided by 19.8 kilohms. FET switch Q3 is closed through-
out the integration period (time T], Figure 8-26) and is
open during periods T 2 and T 3 .
8-94. There are four separate current references in the A/D
Converter. Two of these are positive references and are used
when the A/D input voltage is negative. The other two
references are negative references and are used for positive
inputs. In Figure 8-28 the positive references are shown
above the integrator input line and the negative references
8-17
Section VIII
THEORY OF OPERATION
Model 34SSA
are below. Both (he positive and negative references have a
••fast” discharge reference and a ••slow” discharge reference.
The fast discharge references are used during the Id cycles
of the integration period to discharge the integrator and are
also used for the “fast run-down” period (time tf). The
“slow” discharge references arc used during the •'slow run-
down” period (time 1$) only. Diodes are used to switch the
references because of their high speed switching ability.
The following description uses the positive “fast-discharge”
reference, consisting of Uta, R4. CR2 and Uld, to explain
the reference switching operation. Except for different
input levels to (he negative reference switches, operation of
all reference switching is identical.
8-95. During (he lime the switch is turned ••off', diode
CR2 is forward biased by approximately • 2 V dc on (he
cathode. Current flows from the + 20 volt supply through
R4 and CR2. Under this condition the voltage at the anode
of Uld is negative (approximately • 1.5 Vdc)which reverse
biases Uld, holding it off. (The cathode of Uld is held at
virtual ground by the integrator.) During the ••on” condi-
tion. CR2 is reverse biased by applying approximately
+ 3 V dc to the cathode. Diode Uld becomes forward-
biased and allows the current to flow through R4 to the
integrator input. The purpose of diode Ula is to compen-
sate for the voltage drop across switching diode Uld by
raising the reference voltage by one diode drop. The refer-
ence current is determirud by the voltage across R4 (10 V
dc/IO kilohms^ 1 mA).
8-96. Integrator. The voltmeter uses a conventional inte-
grator circuit with a dual FET input stage for isolation.
Operational amplirwr U3 provides the gain necessary to
keep the input voltage at 0 V (see Figure 8-29).
8-97. Slope Amplifier. The purpose of (he ^ope amplifier
is to increase (he speed of the ••auto-xero” function and
reduce sensitivity to offsets in the aero detect comparator.
The slope amplifier is a conventional non-inverting operat-
(ional amplifier with a gain of 100 and is used to drive the
auto-zero circuitry and zero detect comparator. Sensitivity
at (he output of the integrator is approximately .5 milli-
volts per count of output reading.
8-98. Auto-Zero. The purpose of auto-zero is to reset the
integrator to a known level. During this mode of operation
FF.T switch is closed, completing the auto-zero loop
through slope amplifier U4. The integrator capacitor (C2)
is used as the auto-zero capacitor and stores a charge
equal in amplitude and opposite in polarity to any offsets
in the integrator and slope amplifier circuits. This charge
effectively cancels (he offset errors generated by these
circuits.
8-99. Zero Detect Comparator. The output signal of the
zero-detect comparator is used to detennine the polarity of
(he output reading and which integrator discharge refer-
ences to apply. The output of this circuit is approximately
+ 5 volts for negative inputs and near 0 volts for positive
inputs to the A/D Converter.
8-100. Absolute Value Amplifier. As the name implies, (he
absolute value amplifier is a unity gain circuit which pro-
duces a positive output for cither a positive or negative
input. During positive inputs, the negative output of U5
forward biases transistor Q6 allowing it to conduct. For
negative inputs transistor Q6 is biased off and amplifier US
conducts through diode CR12.
8-101. 10 volt Detect Amplifier. The purpose of the 10
volt Detect Amplifier is to detect when the charge on the
integrator has reached plus or minus 10 volts. This informa-
tion is used by the inguard controller in determining when
to apply the discharge references during the integration per-
8-18
Model 3455A
THEORY OF OPERATION
Section VIII
iod (time Ti, Figure 8-26). For inputs less than 10 volts
the output of the 10 volt Detect j^plifier is near 0 volts.
As (he Input teaches 10 volts the output switches to
approximately + 5 volts.
8-102. 0.2 volt Detect Amplifier. The purpose of the .2
volt Detect Amplifier is to detect when the integrator has
discharged to approximately .2 volts during period T 2
(Figure 8-26). This information is used by the inguard
controller in determining the point to remove the "fast-
discharge” reference and apply the "slow-discharge”
reference.
8-103. INGUARD CONTROLLER.
8-104. General.
8-105. F^ure 8-30 shows the basic steps performed by the
inguard controller. The inguard controller receives data con-
taining range, function, and resolution information from
the main controller. This data, containing 36 bits of infor-
mation and a parity bit, is transferred serially at a rate
determined by the main controller. The inguard controller
decodes the information, sets the input and auto-cal
switches to their required states, and selects the appropriate
range, function, and sample time for the resolution indi-
cated. During the measurement process, the inguard con-
troller manages the analog-to-digital conversion sequence
and stores the digital equivalent of the A/D input voltage.
8-106. Upon completion of the measurement, the digital
information is transferred from the inguard controller to
Figure 8-30. Simplified Inguard Controller Flowchart.
the main controller. This information contains the measure-
ment value and polarity plus a parity bit and is transferred
serially at a rate determined by (he main controller. The
inguard controller is reset to receive mure information by a
reset pulse from the main controller.
8-107. Circuit Description.
8-108. Transfer Circuit. Figure 8-31 shows a simplified
diagram of the data transfer circuitry between the inguard
and main controllers. The direct control lines, DCQ) through
DC3, of the processors arc used for communication. The
inguard and main processors are electrically isolated by
optical isolators. Control lines C>C0 and DCI are driven by
the main controller. During the inguard to main transfer
mode, Line DC0 is used to indicate when the main control-
ler is ready to receive data. Control Line DC! is used for
the transfer-clock signal during both transfer modes. Con-
trol Lines DC2 and DC3 arc driven by the inguard control-
ler. Control Line DC2 is used by the inguard controller to
indicate whether it is in a “send” or "receive” slate. Transi-
tion from the receive to the send status indicates to the
main controller when the inguard controller is ready to
send data. Control Line DC3 is used by the inguard con-
troller to indicate when it is ready to receive data during
the main-to-inguard transfer mode and to send data during
the inguard to main transfer mode.
8-109. Transfer signals for both data transfer modes are
illustrated in Figure 8-32. During the main controller to
8-19
Section VIII
THEORY OF OPERATION
Model 3455A
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Figure 8-32. Data Transfer Signals.
Inguard controller transfer mode, data is valid during the
positive portions of the dock signal and changed during the
negative portions. During the inguard controller to main
controller transfer mode, data is valid during the negative
portions of the clock signal and changed during the positive
portions. The main controller transfers 37 bits of informa-
tion, composed of 6 bits of trigger information, 30 bits of
range and function information and a parity bit, to the
inguard controller. The inguard controller transfers 25 bits
of information, composed of I bit of polarity information,
23 bits of measurement data, and a parity bit, to the main
controller.
8-110. Reset Circuit. The reset line is driven by the main
controller to reset the inguard controller to the beginning
of its program routine. Figure 8-33 shows a simplified
schematic of the reset circuit. A pulse transformer is used
to electrically isolate the reset line between the inguard and
outguard sections of the voltmeter. The reset pulse applied
to the preset input of flip-flop U32A sets the “Q” output
high. The high output of U32A causes the output of U276
to go low. The output of U27B sets the “interrupt request"
input of the inguard processor. Upon receiving interrupt
request, the processor stops driving its data Lines (D0
through D7), allowing them to go high and sets the inter-
rupt acknowledge line high. This signal allows the output
of U27C to go low which puts the “start” address on that
processor’s data bus. The processor (after reaching its
“start” address) sets the interrupt acknowledge line low to
remove the output of U27C from the data bus and to reset
the interrupt circuit to its normal state.
8-111. A/D Converter Control Circuitry. Figure 8-34
shows the control circuitry between the inguard processor
and the analog-to-digital converter. There are six output
lines from the inguard controller which control the input,
reference, and auto-xcro switches in the A/D Converter.
Each output fine controls one of the six switches in the
converter. Switching information for the A/D Converter is
set on the processor's data bus (outputs D0 through DS)
U 28 A
Figure 8-33. Inguard Controller Reset Circuit.
8-20
Model 34S5A
THEORY OF OPERATION
Section VIII
and transferred to the converter through output latch UlS.
Table 8-2 describes the purpose of each of the A/D Con-
verter switch signals and the “true” state of each. The three
“detect” outputs of the A/D Converter arc returned to
“direct control” lines DC4 through DC6 of the processor.
8-112. The “polarity detect” output of the converter is
also applied to the input of the “:rero detect” circuit. The
zero detect circuit is used to detect the end of the “slow”
run-down period. At the beginning of the slow run-down
period, the “Q” output of U32B is set to the same state as
the polarity detect signal by a pulse from U14. The inter-
rupt enable signal from the processor is set high to enable
the zero detect circuit. As the charge on the A/D Integrator
passes through 0 volts, the polarity detect signal changes
state and causes the output of the zero detect circuit to go
low. The low output from the zero detect circuit sets the
processor’s interrupt input to stop the A/D Conversion pro-
Table 6-2. A/D Converter Switch Control Signal
DeKriptions.
Signal
Description
True
State
LVIN
A/D Convener Input twitch signal
(A1403)
Low
LNRS
Nagaiive $low<litcharge reference switch signal
(A14U3c)
Low
Hpns
PMiiive ilow<litcherge reference switch signal
High
HAZ
Auto-zero switch signal (A14Q4)
High
HPRf
Positive fatt-diKherge reference switch signal
(A14CR2)
High
LNRF
Negative fan^iKharge reference switch signal
(A14CR6)
Low
cess. Upon completion of the A/D Conversion process, the
processor sets the interrupt enable signal low to disable the
zero detect circuit.
Figure 8-34. Simplified A/O Converter Control Circuit.
8-21
Section VIII
THEORY OF OPERATION
Model 3455A
Figure 8-35. Simplified Program ROM Circuit.
8-113. Program ROM. Figure 8-35 shows a simplified sche-
malic diagram of the program ROM circuitry used in the
inguard controller. The program RO.M contains the opera-
tion instructions for the inguard controller routine. There
are 512 eight bit program storage locations contained in the
ROM which are addressed by nine input lines (10 through
18). The ROM output is connected to the processor data
lines D0 through D7. The output ofjlie ROM is enabled
only when the signal level applied to 18 is thccomplement
of the level applied to 18. This function is accomplished by
gates Lf29C and 1/29D and occurs wlieri (he processor sets
the "program gate” signal high.
8-114. Output Circuit. The output circuit of the inguard
controller controls all inguard switching of the voltmeter.
Switch control signals are transferred through six latches
(sec Figure 8-36). Hach latch is set individually to output
the proper switch signals. The inguard processor sets the
switching information for the latches on the data bus (pro-
cessor output D0 through DS) and the select code for the
particular latch to accept the information on device select
lines DS0 through DS3. Transfer of information from the
processor to the latches is synchronized by (he clock input
to the processor and (he device select decoder U14.
8-115. MAIN CONTROLLER.
8116. General.
8-1 17. The purpose of the main controller is to control
communication between the front panel. HP-IB interface,
display and inguard section of the multimeter and to per-
form mathematical calculations to correct measurement
data and provide measurement scaling or percent error
readings. The following is an explanation of the operations
performed by the main controller as illustrated in Figure
8-37.
a. The main controller reads and stores the status code
of (he front panel switches flocal operation) or HP-IB buf-
fers (remote operation) to determiflO inOaSUremeiU para-
meters, such as range, function, mode, and sample time.
b. Using the status information, the main controller
generates switching information for the analog section and
transfers this information to the inguard controller.
c. During (he time the inguard controller is setting the
switches and making the required measurements, the main
controller computes (he constants used to correct the mea-
surement data. This step is shown in Figure 8-37 as "per-
form preliminary math calculations" and involves combin-
ing (he offset error and full scale error readings, relevant to
the measurement being made, into two constants.
d. The main controller receives the measurement data
from the inguard controller, applies the correction factors
found in the previous step and computes the corrected
measurement answer.
8-22
Model 34SSA
THEORY OF OPERATION
Section VUl
e. The main controller next checks to see if one of the
math functions have been selected. The math functions pro-
X - z
vide either a scaled answer ( y ), where x is the measure-
ment answer and y and z are values entered by the opera-
x - y
tor, or a percent error answer ( — ~ — x 100), where x is
the measurement answer and y is a^ reference value entered
by the operator. If the math function has been selected, the
main controller computes the math answer.
f. The main controller next checks to see if the HP-IB
buffers are active (outputting data to the bus). If the HP-IB
buffers are not active, the main controller loads the answer
into them. If the buffers are active the controller bypasses
this step.
g. The main controller loads the fmal answer in the dis-
play buffers and returns to the start of the program.
8-1 18. Circuit Description.
B-119. ROM Circuit. The main controller uses three
ROM’s to store the programs necessary to control the var-
ious functions and operations of the voltmeter. Each ROM
is capable of storing 2048, eight bit “words” of program
information and is divided into two “pages” of 1024 words
8-23
Section Vill
THEORY OF OPERATION
Model 345SA
RETURN TO START
each. Five of the six pages contain the programs necessary
for the normal operation of the voltmeter while the sixth
page contains a test program to aid in troubleshooting and
to verify proper operation. This test feature is not program-
mable from the front panel. The ROM’s are addressed by
the main processor through the program address bus (pro-
cessor outputs PA9 through PA9). The program informa-
tion is sent to the processor through the processor data bus
(lines D0 through D7). All ROM's receive the address in-
formation. The particular program information received by
the processor is determined by the program address code,
the page select signal, and which ROM is enabled.
8-120. Figure 8-38 is a schematic of the ROM circuitry.
During normal operation, the test connector JI is con-
nected as shown. This connection disables the upper page
(lest program) or ROM U8 and allows ROM’s U6 and U7 to
be enabled. Removing the jumper permits only the upper
page (test program) of U8 to be enabled. Cormecting the
jumper between ground and the “disable" connection dis-
ables all ROM outputs to aid in testing the main processor.
8-121. During normal operation, the ROM's are enabled in
the following manner. At turn on, only the lower page of
U8 may be enabled. This is because the normal turn on
state of address line PAIO is low which allows U8 to be
enabled and “holds ofT’ the enable circuitry for ROM’s
U6 and U7. To enable ROM’s U6 or U7, the foUowing
sequence is used.
a. The code to select the desired ROM and page is set
on data lines D0 and Dl. Line D0 is used to select the page
and is set high for upper pages and low for lower pages.
Line Dl is used to select the particular ROM and is set high
to select ROM U6 or low to select U7.
b. The device select code to select output YS of U3 1 is
sec on device select lines DS(} through DS3.
c. Address line PAIO is set high to disable ROM U8 and
allow ROM’s U6 and U7 to be addressed.
d. The READ/WRITE line is set high (write).
The above outputs are synchronized by the clock signal.
The combination of the output from the device select
decoder U33 and the WRITE output from the processor
causes a pulse at the clock input of US and sets the Q 1 and
Q2 outputs to the levels of data lines D<3 and Dl (page and
ROM select data). Once US is set the processor data lines
(D0 through D7) and READ/WRITE line are released for
other operations. Address line PAIO remains high as long as
ROM U6 or U7 are to be addressed. The output of the
ROM and page selected is then enabled when the Program
Source Cate is set h^h. To return to the lower page of U8
it is only necessary to set address line PAI0 low.
Figure 8-37. Simplified Main Controller Flowchart.
8-24
8-122. At the beginning of an “interrupt sequence’’ the
processor enables gates U3A and U3B by activating output
YS of the device select decoder and setting the READ/
Model 3455A
THEORY OF OPERATION
Section VllI
I lacoa«
iUWnTc
Figure 8-38. Main Controller ROM Circuit.
WRITE output low (READ). The outputs of U3A and U3B
are then sent to the processor through data lines D0 and D1
and represent the page and ROM that was active at the
time of interrupt. The ROM and page information along
with the address code arc stored by the processor so that
after the interrupt routine it can return to that step in the
program.
8-123. RAM Circuit. The RAM’s are used to store temp-
orary data such as auio-cal constants, display data, front
panel and HP-IB status codes, math computations and
references, and control status codes. Figure 8-39 is a sche-
matic diagram of the main controller RAM circuit. The
RAM's can be set to a particular address by the main pro-
cessor or are automatically incremented to the next mem-
ory address each time data is stored or read. This method
allows groups of data to be transferred between the RAM's
and main processor without having to address each step and
results in higher operating speed.
8-124. The RAM's are addressed by the main processor in
the following manner:
a. The processor sets the desired address code on data
lines DQ) through D7. sets the proper code on the device
select lines (DS0 through DS3) to activate output Y4 of
device select decoder U4I, and sets the Read/Write output
high (write).
b. The outputs of the processor and the device select
decoder are synchronized by the clock signal.
c. The Rcad/Writc signal enables buffers U34 and U42
to apply the address code to the inputs of presettable
counters U36 and U37.
d. The negative-going pulse from output Y4 of device
select decoder U41 is applied, thix^ugh gates U38B and
U3SD, to the "load" inputs of U36 and U37 to load the
address code into them. The code which has been loaded
into the presettable counters is then applied to the address
inputs (lines A0 through A7) of the RAM's (U44 and U4S
U45).
8-I2S. Data is stored in the RAM’s as follows:
a. The processor sets the data to be stored on data lines
through D7, sets the proper code on device select lines
DS0 through DS3 to activate output Y1 of device select
decoder U41, and sets the Read/Write output high (write).
8-25
Section Vni
THEORY OF OPERATION
Model 3455A
Figure 8-39. Main Controller RAM Circuit.
b. The Read/Writc signal enables buffers U34 and L)42
to apply the data to the RAM's I/O lines and is also applied
to the R/W input of the RAM's to enable the write ampli-
fiers. The negative-going pulse from output Y1 of U41 is
applied to the CE inputs of the RAM’s to enable them to
store the data. Output Y1 of U4I is also applied to the
“clock" inputs of U36 and U37 (through U38) to incre-
ment the address code by one upon completion of the
“store” operation.
8-126. The processor “reads” data from the RAM’s as
follows
a. The processor sets the code necessary to activate out-
put YI of U4I on device select lines DS9 through DS3, and
sets the Read/Write line low (read).
b. The Read/Write signal is inverted by U4F and applied
to the RAM's R/W input to enable the output buffers. The
negative-going pulse from output YI of U4I is applied to
the CE input of the RAM's to enable their outputs. The
RAM output data is applied to the inputs of buffers U3S
and U43 which are enabled by the low output of gate
U46A.
c. The data is read by the processor on data lines DQ
through D7.
d. As with the “store” sequence, the negative pulse
from output YI of the device select decoder is applied,
through gate U38D, to the “clock” input of counters U36
and U37 to increment them to the next address.
8-127. ALU Circuit. The Arithmetic Logic Unit (ALU)
provides added computational capability to the main con-
troller for computing Auto-Cal constants, measurement
data corrections, and “scale” and "% error” math func-
tions. The ALU also provides logic functions which are used
for certain control operations. The ALU performs Arith-
metic or Logic operations on two, 22 bit binary numbers in
eight bit segments starting with the eight least significant
bits.
8-128. Figure 8-40 shows a schematic diagram of the ALU
circuit used. The numbers to be entered into the ALU’s are
8 bit binary codes and are entered as follows:
a. The processor sets the numerical data on data lines
DO through D7, sets the READ/WRITE line high (write),
and sets the device select lines DSO through DS3 to the
code necessary to activate the proper output of device
select decoder U33 (output YI for number “A”, Y2 for
number “B”).
b. The outputs of the processor and device select
decoder arc synchronized by the clock signal.
c. The READ/WRITH signal enables buffers U34 and
U42 to apply the binary information from the processors
data output to the ALU input latches. The information is
set in latches U29 and U31 (number “A”) or U24 and U25
(number “B”) by the signal from device select decoder
U33.
d. The ALU operation instruction is a 6-bit binary code
8-26
Model 3455A
THEORY OF OPERATION
Section VIII
composed of a 4-bi( instruction code, 1 bit of mode infor-
mation to determine whether the operation is to be an
arithmetic or logic function, and 1 bit of “carry” informa-
tion.
e. The operation instruction is entered into the ALU’s
in the same manner as the numerical data except, only pro-
cessor data lines D9 through D5 are used to output the
data.
8-129. The output of the ALU’s is read by the processor in
the following manner;
a. The processor sets the READ/WRITE line tow
(READ) to disable buffers U34 and U42 and sets the
proper code on device select lines DS0 through DS3 to
activate output Y4 of U33.
b. Output Y4 of U33 enables the ALU output buffers
U2 1 and U22 and the data Is read by the processor on data
lines D0 through D7. In the event that a “carry” occurred
during the ALU operation, the carry output (CN + 4) of
U28 is output through gate U16B to set F4 of the proecs-
for.
8-130. Interrupt Circuit. The Interrupt Circuit is used to
signal the main processor when the front panel switch data
has been changed, when an external trigger has been
applied, when the HP-IB (Hewlett-Packard Interface Bus)
needs service, or at “turn-on”. The Interrupt Circuit is also
used to strobe the front panel display. The Interrupt Cir-
cuit has been designed so that the Interrupt Signals arc
assigned priorities. In the event of two or more Simultane-
ous Interrupt Signals, the one with the highest priority will
be handled first. The HP-IB Interrupt is assigned the highest
priority and will be serviced before the external trigger or
front panel interrupts. The external trigger interrupt is
assigned the second highest priority and will be serviced
before the front panel interrupt. All three interrupt signals
have priority over the display strobe signal. The turn-on
interrupt occurs only at initial turn-on of the voltmeter.
Figure 8-41 is a simplified schematic of the Main Controller
Interrupt Circuit.
8-131. HP-18 Interrupt. When the HP-IB requires service,
it sets the HP-IB Interrupt signal high. This signal is applied
to the input of US3B. The output of U53B is applied to
U47B to disable the front panel interrupt circuit and
through US2A to the interrupt gates which set the proces-
sors interrupt input. The HP-IB interrupt input is also
applied to U46D to set the interrupt address. Upon recog-
nizing the interrupt input, the processor sets the interrupt
enable low, to remove the interrupt input, and sets the
interrupt acknowledge high, to enable address gates U47D
and U46D. The address gales set the interrupt address on
the processors data bus. It is possible for both the external
trigger interrupt and the HP-IB interrupt to occur simultan-
eously and set their respective interrupt address code on the
processor data bus. When this occurs, the processor is pro-
grammed to vector to the HP-IB Interrupt address to main-
8-27
Section VUl
THEORY OF OPERATION
Model 3455A
tain priorities. After accepting the interrupt address, the
processor sets the interrupt acknowledge line low to disable
address gates U46B and U46D. The processor then services
the HP-IB to dear the intenupt input.
8-132. External Trigger Interrupt. Operation of the Exter-
nal Trigger Interrupt is the same as the HP-IB Interrupt
with the exception of the interrupt address gate activated.
During External Trigger Interrupt, address gate U44B is
used to set the interrupt address on the processor’s data
bus.
4-133. Front Panel Interrupt. When the status of the front
panel switches is changed, the switch status interrupt signal
is set high. This removes the “dear" signals from U40A and
U40B and triggers the monostable multivibrator U48A. The
output of the multivibrator is a negative pulse approxi-
mately 6 milliseconds in duration. This negative signal is
applied to interrupt gates US5B and USSC to disable the
interrupt input to the main processor. This insures that the
processor is not Interrupted by the other interrupt signals
while the front panel is being serviced. The negative output
of U48A is_also applied t^the “preset” input of U40B to
set output Q low. Output Q of U40B is applied to U47D to
disable the interrupt address gates and through U39B to set
the inputs of U47A and USSC high.
8-134. As the output of multivibrator U46A returns high,
the following occurs;
a. The front panel output latch is set to the new switch
status code.
b. The positive-going _^al is applied to the “dock”
input of U40A to set the Q output low. This signal, applied
through U47B and U39C, disables the input of U48A to
prevent premature retri^ering.
c. Interrupt gate USSC is enabled to set the main pro-
cessor interrupt input.
8-13S. Upon recognizing the interrupt signal, the main pro-
cessor sets the interrupt enable output low to remove the
interrupt signal and sets the interrupt acknowledge signal
high. The interrupt acknowledge signal enables gale U47A
which enables the front panel output buffers allowing them
to set the new switch status code on the processor's data
bus(D0 through D7).
8-136. Upon accepting the switch status information, the
processor sets the interrupt acknowledge signal low. This
signal is applied to U47A to disable the front panel output
buffers ^nd through U39A to the clock input of U40B to
set the Q output high. This removes the disable from U47D
and applies a disable signal to USSC and U47A.
8-137. When the front panel switch is released, the front
panel interrupt signal is set low. This resets the trigger
enable input of U48A and sets the “clear” inputs of U40A
and U40B to return the circuit to its “ready" state.
8-138. Display Strobe Circuit. When no interrupts are pre-
sent, the interrupt circuit is used in the display function of
the voltmeter. Monostable multivibrator U48B is triggered
8-28
Model 3455A
THEORY OF OPERATION
Section VIII
Figure 8-42. Simplified Turn-on Interrupt Circuit.
by output Y2 of device select decoder U41 . The output of
U48B is a negative pulse approximately 1 millisecond in
duration and is applied to the strobe inputs of the display
driver decoder to enable it. As the output of U48B returns
high, gate US3B is enabled. The low output of US3B is
applied through US2A to the interrupt gates to set the pro-
cessor’s interrupt input of the processor. Upon noting the
interrupt, the processor sets the interrupt enable signal low
to remove the interrupt input and sets the interrupt
acknowledge high to enable the interrupt gates. The pro-
cessor then checks the data bus (D0 through D7) for the
interrupt address. In this case all data inputs are high which
the processor recognizes as the display function interrupt
address.
8-139. Turn-On Interrupt. The purpose of the “tum-on”
interrupt is to start the main processor at a known program
address when power is initially applied to the voltmeter.
Figure 8-42 shows a simplified schematic of the turn-on
interrupt circuit. At tum-on, a negative-going pulse is
applied to the “preset” input of latch U26B from the RC
network composed_of R3 1 and C19. This sets the “Q” out-
put high and the “Q” output low. The Q output is applied
Co U47C which sets the intermpt input to the processor.
The Q output is applied through inverter US to the pro-
cessor data bus (D2 through 07) to set the starting address.
8-140. Upon recognizing the interrupt signal, the processor
reads the start address from the data bus and sets the inter-
rupt acknowledge output low. The interrupt acknowledge
signal is applied through inverter U39A Co the “dock^
input of U26B. This sets the Q output low and the Q
output high, disabling the turn-on interrupt circuit.
8-141. HP-iB CIRCUIT.
8-142. General.
the integration of instruments, calculators, and computers
into systems. The HP-IB employs a 16-line Bus to inter-
connect up to IS instruments. Normally, this Bus is the sole
communication link between the interconnected units.
Each instrument on the Bus is connected in parallel to the
16 Bus lines. Eight of the lines are used to transmit data
while the remaining eight lines are used for communication
timing (Handshake) and control. Data is transmitted on
the eight data lines as a series of eight-bit characters
(“bytes"). Normally, a seven-bit ASCII code is used with
the eiglith bit available for a parity check. Data is trans-
ferred by means of an interlocked “handshake” technique
which permits asynchronous communication over a wide
range of data rates. Figure 8-43 illustrates the HP-IB inter-
face connections and overall Bus structure. Bus communica-
tion is controlled by the five general interface management
(control) lines. These lines determine how information will
be interpreted by devices on the Bus. The data bus (lines
DIOl through D108) is used to transfer information be-
tween devices on the Bus. The three data byte transfer
control (handshake) lines permit synchronization of the
data transfer on the data bus.
8-144. Circuit Description.
8-145. Initial Turn-On. (Refer to the HP-IB Schematic for
the following descriptions.) The interface circuit is initial-
ized by the main controller at "turn-on”. After completion
of the tum-on sequence and before the Bus is active the
following conditions exist :
a. The outputs of latches U1 1, U19, U20, and U26A are
low.
b. Signal inputs to buffers UlS, UI6, U17 and U18 are
low.
c. Inputs to interrupt gates U7A and U7C are low caus-
ing the interrupt output (U2A pin 3) to be low (false).
8-143. The Hewlett-Packard Interface Bus (HP-IB) is a d. All driver inputs and receiver outputs of Bus Trans-
carefully defined instrumentation interface which simplifies ceivers U6, U9 and U12 arc low.
8-29
Section VllI
THEORY OF OPERATION
Model 3455A
NOTE
It is possible for the interface circuit to momen-
tariiy drive the Bus lines low (true) before the
tum-on sequence has been completed.
8-146. Circuit Response to Bus Commands. The following
description explains the Voltmeter interface circuit re-
sponse to command statements received from the HP-IB
(Hewlett-Packard Interface Bus). This description is divided
into five parts as follows:
a. Acceptance of the command data.
b. Voltmeter execution of the command.
c. Completion of the ‘'handshake" sequence.
d. Receive Data.
e. Output Data.
8-147. Acceptance of the Command Data. The follow-
ing describes the sequence performed by the Voltmeter
interface circuit to accept command data. This sequence
applies to all command statements received from the
HP-IB.
8-148. The controller in charge of the HP-IB sets the code
of the command data to be transferred on data lines DIO I
through DIOS and sets the ATN (Attention) line low (true).
The ATN signal is input to the Voltmeter interface circuit
through inverter U3E and is applied to the input ofbuffer
UlSA and inverter U3B. The low output of USB disables
qualifier gates U2D, UI4B, U14D and UI3D and is applied
to U2C to set its output high. The high output of U2C sets
the enable inputs of UlSA and U13B. The high output of
U13B is applied to the driver B input of transceiver U9 to
set the NDAC output low (true). This indicates to the
HP-IB controller that the Voltmeter is ready to accept data.
8- 149. After allowing time for the data on the DIO lines to
“settle", the HP-IB controller sets the DAV (data valid) line
low (true). The DAV signal is input to the interface circuit
through transceiver U9 and is applied to the signal input of
qualifier gate UlSA. The high oulputofUlSA is coupled
through gate U2B and inverter UlOD to the inputs of
buffer UlSD and interrupt gate U7C. The low (true) output
of U7C is applied to the input of U2A to set the interrupt
signal to the main processor.
8-ISO. Upon recognizing the interrupt signal, the main pro-
cessor enables buffers UlS and UI6 to read the status
word. In this case, bit 3 is set, indicating valid data is on the
bus, bit 5 must be set to enable the voltmeter to go to
remote operation, and bit 6 is set to indicate the message is
a command statement. The main processor enables buffers
U17 and UI8 to read the data byte.
8-151. After reading the data byte, the processor sets the
“nrfd" output (IQ) of latch Ull high (true). The nrfd
8-30
Model 34S5A
THEORY OF OPERATION
Section VIII
signal is applied to the enable input of qualifter gate UI3C
and the driver A input of bus transceiver U9. Transceiver
U9 drives the NRFD bus line low (true), indicating the
Voltmeter has accepted the data. The processor next sets
the “ndac” output (6Q) of latch Dll high (false). The ndac
signal is applied through inverter U lOA to the enable input
of U2B and the signal input of U13B. The low output of
U13B is applied to the driver B input of transceiver U9 to
disable it and allow the NDAC Bus line to go high (false).
8*152. Execution of Command Instructions. After the
command data has been accepted, as previously described,
the main processor deciphers the data to determine the
nature of the command. This section describes the interface
circuit response to the following Bus commands:
a. “Listen” Command
b. “Unlisten” Command
c. “Talk” Command
d. “Untalk” Command
8-153. Listen CommarxJ. When the processor receives a
listen address from the HP-IB it enables inverter U1 and
reads the address code the Voltmeter has been set to. This
code is determined by the settings of switch SI. The pro-
cessor compares this code with the one received to deter-
mine if it has received its listen address. Upon recognizing
the listen address of the Voltmeter, the processor sets the
output (pin 10) of U70 low to turn A2CR2 (listen enunci-
ator) on (see Front Panel Assembly Schematic). The pro-
cessor next sets the “mla” output (4Q) of U1 1 high (true).
The mla signal is applied, through inverter USD. to the
input of qualifier gate U2C to maintain its output high. At
this point the Voltmeter has been addressed to listen and
enabled to receive data messages.
8-154. Unlisten Command. Upon recognizing the “un-
listen” command, the processor sets the output (pin 10) of
latch U70 high to turn A2CR2 (listen enunciator) off (see
Front Panel Assembly Schematic). The processor next sets
the “mla" output (^) of latch U1 1 low (false) to return
the interface circuit to the “turn-on” state.
8-155. Talk Command. When the processor receives a
“talk” address from the HP-lB it enables inverter U1 and
reads the address code the Voltmeter has been set to. This
code is determined by the settings of address switch SI.
The processor compares this code with the one received
from the HP-IB to determine if it has received its talk
address. Upon recognizing the talk address of the Volt-
meter. the processor sets the output (pin 7) of latch U70
low to turn A2CR3 (talk enuncaitor) on (see Front Panel
Assembly Schematic). The processor next sets the "dav
req” output (SQ) of latch Ull high (true). This signal is
applied to the enable input of qualifier gate U14C. At this
point the Voltmeter has been addressed to “talk” and is
awaiting the removal of the ATN signal by the HP-IB
controller before outputting measurement data.
8-156. Untalk Command. Upon recognizing the “untalk”
command, the processor sets the output (pin 7) of latch
U70 high to turn the “talk" enunciator (A2CR3) off (see
Front Panel Assembly Schematic). The processor next sets
the “dav req "output (5Q) of latch U 1 1 low (false) to return
the interface circuit to the “turn-on" state.
8-157. Handshake Completion. After all instruments on
the HP-IB have accepted the command data (the NDAC Bus
line has gone high) the HP-IB controller sets DAV high
(data is no longer valid). This sets the receiver D output of
transceiver U9 low. The low output of U9 is applied to the
input of U13A and through inverter UlOC to the input of
qualifier gate UI3C causing its output to go high. The out-
put of U13C is applied to the signal input of buffer UI5C
and to the input of interrupt gate U7A. The low output of
U7A is applied to the input of gate U2A to set the interrupt
signal to the processor.
8-IS8. Upon recognizing the interrupt signal, the processor
envies buffers UlS and UI6and reads the interrupt code.
In this case bit 4 is set, indicating the completion of a data
byte. The processor determines the nature of the interrupt
and sets the “ndac” output (6Q) of latch U1 1 low (true).
The low output of Ul 1 is applied through inverter UlOA to
the inputs of U2B andUI3B. If the ATN signal or the mla
signal is true the output of U13B will be set high. The high
output of U13B is applied to the driver B input of trans-
ceiver U9 to set the NDAC line low (true). The processor
next sets the “nrfd” output (IQ) of Ul 1 low (false). The
low output of Ul 1 is applied to the driver A input of U9
to set the NRFD output high (false) and to the input of
U13C to disable it and remove the interrupt signal. This
completes the sequence for accepting and executing com-
mand statements.
8-159. Receive Data. Data received from the HP-IB Is used
to remotely program the Voltmeter’s front panel controls
(range, function, math, etc.). The Voltmeter must have pre-
viously been addressed to “listen” and set to remote con-
trol before it will respond to program data messages.
8-160. The following paragraphs describe the interface cir-
cuit response to program data messages. The HP-IB control-
ler sets the program information on Bus lines DIOl through
D108. After allowing lime for the information to “settle",
the controller sets DAV (data valid) low (true). The DAV
signal sets the receiver D output of transceiver U9 high
(true). The high output of U9 is applied through inverter
UlOC to the input of qualifier gate UI3C to disable it and
to the input of U13A. The output of UI3A is coupled
through gate U2B and inverter UIOD and applied to the
input of buffer U15D and interrupt gate U7C. The low out-
put of U7C is applied to the input of gate U2A to set the
interrupt output to the main processor.
8-161. Upon recognizing the interrupt signal, the processor
enables buffers UlS and U16 and reads the status word.
After determining the nature of the interrupt, the processor
enables buffers U17 and UlS and reads the program data.
If the processor has read the first byte of program data
(two bytes are required for each program step) it sets a flag
8-31
Section VIII
THEORY OF OPERATION
Model 3455A
and retains the first data byte information. If the processor
has read the second byte of information it stores the com-
posite of the first and second bytes and sets the appropriate
output of enundator latches U6S through U70 low (true)
to light the enundator pertaining to the program informa-
tion. The processor next sets the nrfd output (IQ of latch
U1 1 high (true). The output of Ul I is applied to the enable
input of qualifier gate U13C and to the driver A input ol
transceiver U9 which sets the NRFD bus line low (true).
The processor next sets the ndac output (6Q) of latch Ul 1
high (false). This signal is applied through inverter UlOA
to the input of qualifier gate U2B to disable it and remove
the interrupt signal to the processor. The ndac signal is also
applied to the input of gate U13B. The low output of U13B
is applied to the driver B input of transceiver U9 which
stops driving the NDAC bus line (allows it to go high). This
indicates to the HP-IB controller that the Voltmeter has
accepted the data and is ready for more data.
8- 162. Sensing that the Voltmeter has accepted the data,
the HP-IB controller sets the DAV line high (data on the
DIO lines is no longer valid) and prepares to output the
next data byte. The DAV high signal sets the receiver D
output of transceiver U9 low. The low output of U8 is
applied to the input of gate U ISA to disable it and through
inverter UlOC to the input of gate U13C. The high output
of U13C is applied to the signal input of buffer UI5C and
to the input of interrupt gate U7A. The low output of U7 A
is applied to the input of gate U2A to set the interrupt out-
put to the processor. The processor recognizes the interrupt
signal and enables buffers UIS and U16 to read the bus
status word.
8-163. Upon determining the nature of the interrupt, the
processor sets the ndac output (6Q) of latch Ull low
(true). The output of Ul 1 is applied through inverter UlOA
to the input of qualifier gate U2B and to the input of gate
UI3B. The high output of U13B is applied to the Driver B
input of transceiver U9 which sets the NDAC Bus line low
(true). The processor then sets the nrfd output (IQ) of
Ull low (false). This signal is applied to the driver A input
of U9, which sets the NRFD bus line high (false), and to
the input of qualifier gate UI3C to remove the interrupt
signal. This completes the sequence for accepting one byte
of program data.
8-164. Output Data. The following paragraphs describe
the sequence followed by the interface circuit to output
measurement data to the HP-IB. The voltmeter must have
previously been addressed to “talk" and the HP-IB must
NOT be in the command mode before the voltmeter can
output measurement data.
8-165. When the Voltmeter is addressed to talk the “dav
rcq” output (5Q) of latch Ull is set high (true). As the
HP-IB exits the command mode (the ATN signal is re-
moved) and ail bus instruments are ready to accept data
(NRFD is high) the output of qualifier gate U14C is set
low. The output of UI4C is applied to the input ofbuffer
U16C and the input of interrupt gate U7C. The low output
of U7C is applied to the input of U2A which sets the inter-
rupt output to the processor.
8-166. Upon recognizing the interrupt signal, the processor
enables buffers UIS and UI6 to read the status word. After
determining the nature of the interrupt the processor sets
latches U20 and UI9 to the code of the first byte of mea-
airement data. The outputs of UI9 and U20 are applied to
the driver inputs of transceivers U6 and U12. The processor
next enables transceivers U6 and UI2 to output the mea-
surement data to the HP-IB data bus (DIO I through DI07).
After the measurement data has had time to “settle”, the
processor sets the “dav” output (2Q) of latch Ull high
(true). The dav signal is applied to the input of qualifier
gate U14A and gate U13D. The high output of UI3D is
applied to the driver D input of transceiver U9 which sets
the DAV Bus line low (true). The processor then sets the
dav req output (SQ) of latch Ul 1 low (false). This signal is
applied to the input of qualifier gate U14C to disable it and
remove the interrupt signal. When the measurement data
byte has been accepted by the receiving instrument(s) the
NRFD line is set low and the NDAC line is high. The NDAC
signal sets the Receiver B output of transceiver U9 iow.
This output is applied to the input of qualifier gate UI4B.
The high output of U14B is applied to the input of gate
UI4A to enable it. The low output of U14A is applied to
the signal input of UI6D and to the input of interrupt gale
U7C. The low output of U7C is applied to the input of
U2A to set the interrupt output to the processor.
8-167. Upon recognizing the interrupt, the processor
enables buffers U16 and U15 and reads the status word.
After determining the nature of the interrupt, the processor
sets the dav req output (5Q) of latch U! 1 high. The proces-
sor then sets the dav output (2Q) of UlO iow (false). This
signal is applied to the input of gate U13D to remove the
DAV signal from the Bus and to the input of qualifier gate
UI4A to remove the interrupt signal. This completes the
output of one data byte. The sequence is repeated until
each byte of measurement data has been output.
8-168. FRONT PANEL OPERATION.
8-169. Circuit Description.
8-170. Control Switches and Ennunciatort. Refer to the
Front Panel Assembly Schematic for the following descrip-
tion. Pressing a front panel key sets one of the input lines
to priority encoder U57 low. The output of the encoder is
the octal equivalent of the input line selected that is, the
output when line “17” is set low is 111, when line “12” is
low the output is 010, etc. The encoder also sets the gate
output (pin 14) low to initiate the processor interrupt cir-
cuit. The outputs of U57 combined with the outputs of
gate USOA and inverter U49A are applied to the inputs of
latch US8. The inputs to US8 make up a code which repre-
sents the key pressed. The interrupt circuit, after a time
delay of approximately 6 ms, sets the clock input (pin 9)
8-32
Model 34SSA
THEORY OF OPERATION
Section Vlll
of US8 high to latch the switch code and also sets the inter-
rupt input to the main processor.
8-171 . Upon recognizing the interrupt input, the processor
sets the interrupt enable output high to enable buffers U59
and U60 and reads the switch code. This code represents a
vector address to the processor. The processor performs the
program routine contained at the address indicated which
includes transferring the new switch data to the inguard
controller and outputting data to the front panel to change
the necessary cnunciators.
8-172. The new enunciator data is output to the data bus
(lines D0 through D7) by the main processor and applied to
the inputs of latches U6S through U70. The new enunciator
code is contained on lines 00 through 05. Lines 06 and 07
are applied to the select inputs of decoder U64 and arc used
to determine which output of U64 will be set low. Outputs
1Y0 through 1Y3 are enabled by the signal from device
select decoder U41. Outputs 2Y0 and 2Y1 are enabled by
8-173. Display. Measurement data is transferred to the
display one number at a time. The polarity or numerical
data is applied to the input of latch US4 and the digit (or
position in the display) and decimal information is applied
to the input of latch U63. The output of device select
decoder U41 is applied to the clock input of US4 and U63
to latch the information. The position information is ap-
device select decoder U33. The outputs of U64 are acti-
vated by the delayed clock signal from U52F and applied
to the clock inputs of latches U6S through U70. All
outputs of U64 are high except the one driving the latch
which is to accept the data. The enunciators are lit when
the output of the latch driving them is set low.
plied to the select and data inputs of US6 to determine the
proper display driver to be activated. The outputs of U.56
are applied to the display drivers (Q1 1 throu^ Q18) and
are enabled by- the signal from U48B (interrupt circuitry).
The display is scanned from left to right one number at a
time.
8-33/8-34
Model 34SSA
Section VIII
TROUBLESHOOTING
B-174. INTRODUCTION.
8-175. The following ponions of this manual contain
information to aid in troubleshooting and repair of the
34S5A. This information consists of a General Block
Diagram Theory of Operation, a Preliminary Trouble-
shooting Check, and eight Service Croups. An instru-
ment block diagram and schematics are also included in
this section of the manual.
8-176. Ganaral Bloch Diagram Theory of Operation.
8-177. Read this subsection if you wish to become
familiar with the internal operation of the 34S5A. Refer
to the simplified block diagram (Figure 8-44) for the
following discussion.
8-178. To understand the basic operation of the 345SA,
the instrument can be divided into two sections. These
sections of the Outguard Section and the Inguard Sec-
tion.
B-179. Outguard Section.
8-180. The Outguard Section consists of most logic cir-
cuits and their power supplies. These circuits function as
the internal main controller, HP-IB interfacing, and
front panel interface of the instrument.
8-181. The main controller circuits are used to control
communication between the front panel. HP-IB inter-
face, and the Inguard Section. The controller also per-
forms mathematical calculations to correct measure-
ment data, and to provide instrument scaling or percent
error readings.
8-182. The heart of the main controller circuits is a pro-
cessor (referred to as the nanoprocessor) used in con-
junction with the main controller ROMs. The processor
and ROMs are located on the A3 board. The ALUs are
used for calculations and are located on the A1 mother-
board.
8-183. The front panel is used for the manual operation
of the instrument and to display readings. By pressing a
pushbutton on the front panel, the controller receives a
message to do the operation requested by the operator
(DC, AC, etc.). The main controller then sends a
message to the inguard controller to do the operation.
After the operation is completed, the inguard controller
then sends information back to the main controller. The
information is then converted and displayed on the
front panel.
8-184. The HP-IB circuits are used to communicate bet-
ween the HP-IB and the instruments main controller.
Information can pass either from the HP-IB to the main
5r«EiK~
Figure B-44. Simplified Block Diagram.
8-35
Section VHI
TROUBLESHOOTING
Model 34S5A
controller or from the main controller to the HP-IB. Ex-
ample: the main controller receives a message from the
Bus to read DC. After a reading is taken, the main con-
troller sends the reading to the Bus. It should be noted,
as with the front panel, the bus circuitry can interrupt
the main controller whenever necessary (to clear inter-
face, etc.).
B-185. Inguard Section.
8-186. The Inguard Section consists of (he measuring
circuitry, a controller, and power supplies. The main
function of these circuits is to perform Auto-Cal, DC,
AC, and Ohms measurements. These circuits arc con-
trolled by an inguard controller, which in turn are par-
tially controlled by the outguard controller.
8-187. The circuits used for Auto-Cal and DC
measurements are basically the same. The Auto-Cal
measurements consists mostly of gain and offset
measurements of various op-amps and FETs. The Auto-
Cal function can be turned on or off, as desired by the
operator.
8-188. The following procedure outlines a typical DC
measurement.
a. A DC signal is applied to the input of the 3455A.
This signal may or may not be attenuated by the input
attenuator circuits.
b. The signal is next applied to the Main Amplifier
through the Auto-Cal and Measurement Switching cir-
cuits. After pre-amplifications by the Main Amplifier,
the signal is applied to the A/D convertor (10 V DC for
full scale).
c. The A/D convertor changes the analog signal to a
digital signal and sends the digital signal to the inguard
controller. The inguard controller (hen transfers this in-
formation to the outguard controller.
d. The outguard controller processes the information
and displays the reading on the front panel.
8-189. Auto-Cal measurements are taken in the form of
Auto-Cal constants and are used to compensate for in-
ternal measurement errors. To help generate the cal con-
stants (gain and offset), stable reference voltages (±
10 V) and stable resistive divider (1 kO, 100 kR, 900 kR,
and 1 MR) are used. These circuits are located on the
reference module. The reference voltages are also used
for the operation of the A/D convertor.
8-190. The ohms convertor is used to supply the current
for an ohms measurement and in turn causes a voltage
drop across the unknown resistor. The voltage drop
depends on the value of the unknown resistor and the
range of (he instrument. This voltage is measured along
with a voltage drop across a reference resistor, by the
DC circuits of the 3455A. The DC readings are then
converted to digital readings and passed on to the main
controller. The reading is then calculated by the main
controller to an ohms reading to be displayed on (he
front panel.
8-191 . The 3455A offers a choice of either a True RMS
or an Average Responding AC Convertor. Both conver-
tors changes an AC voltage to a DC voltage with an
amplitude of approximately 6.7 V for a full scale in-
put. This resultant DC voltage is (hen processed by the
DC circuits, as explained in paragraph 8-188, with the
exception of the DC attentuator circuits. The attenua-
tion is done on the AC convertor board. The main con-
troller receives the digital information from the inguard
controller and is then processed to be displayed as an
AC reading on the front panel. The following is an ex-
planation of the differences between the convertors.
a. True RMS Convertor; The True RMS Convertor
can cither be AC or DC coupled. Using operational cir-
cuitry, the input voltage to (he convertor is changed to a
DC level proportional to the RMS value of the input
voltage.
b. Average Responding Convertor: The Average
Responding Convertor is only AC coupled. An average
responding circuit calibrated to the RMS value of a
sinasoidal input voltage, is used in this convertor. The
resultant DC output of the convertor is a voltage pro-
portional to the average value of the input voltages ab-
solute value.
8-192. The inguard controller controls the operation of
the inguard section after receiving instructions from the
outguard controller. The inguard circuits being control-
led are used to perform the various measurements.
8-193. For a more detailed explanation of the 34SSA’s
circuitry, refer to the Theory of Operation Section in
this manual (paragraph 8-10).
8 194. PRELIMINARY TROUBLESHOOTING CHECK.
8 195. INSTRUMENT HALF SPLITTING TECHNIQUES.
8-196. Before proceeding to a particular service group
for troubleshooting the 34S5A should be half-split. This
is done to determine if the failure is in the inguard or
outguard section of the instrument. The following pro-
cedure can be used.
a. Haif-splitting can easily be accomplished with an
Inguard/Outguard Service Cable (part number
03455-61609) and a working 3455A (a second in-
strument) as follows:
I. With each 34S5A turned off, disconnect the
AlOWl Inguard/Outguard cable assembly from
the outguard connector (A1J7) on each 3455A.
8-36
Model 3455A
TROUBLESHOOTING
Section VIII
2. Plug the Inguard/Outguard Service Cable
from one instrument’s outguard connector (A1J7)
to the other instrument's Inguard/Outguard cable
assembly (Wl). The instruments are now effec-
tively half-split with one unit’s inguard section
connected to the other unit’s outguard section (see
(Figure 8-45)
3. Turn on the instrument with the active in-
guard section and then turn on the instrument
with the active outguard section. The display from
the unit with the active outguard should become
energized. If the instrument malfunction has
disappeared, then the portion of the defective in-
strument used (inguard or outguard) is working.
Consequently, if the malfunction remains, the sec-
tion of the defective instrument used is in-
operative.
4. The defective section can be verified by
reversing the Inguard/Outguard Service Cable
and repeating steps 2 and 3. Make sure the
3455A’s are turned off, when switching connec-
tions. Reversing the service cable should verify the
defective section of the inoperative 34SSA and
also the working section.
NOTE
Make sure the power supplies of the in-
operative 34S5A are good.
b. Once it has been determined in what section the
defective is located (Inguard or Outguard), the correct
Service Group can be used for component isolation (see
Paragraph 8-198 for a summary of the Service Groups).
8-197. If an extra 34SSA or an Inguard/Outguard Ser-
vice Cable is not available, use the method described in
Service Group H, Figure 8-H-2. This method is not as
complete as the half-split technique.
Figure B-4S. Inguard-Outguard Connections.
8-198. Service Group Summarv.
8-199. The following is a summary of the various ser-
vice groupsand should be used in conjunction with
Table 8-3.
a. Turn-On Circuitry (Service Group A): Turn-on
failures show up as an inoperative front panel "and” a
blank display, at turn on. Use this service group if both
of these symptoms are observed. The turn-on circuitry is
working properly, if there is any indication on the
display and the front panel is operative.
b. Auto-Cal and DC Troubleshooting (Service
8-37
Section VIII
TROUBLESHOOTING
Model 34S5A
Tfbl« 8-3. Service Creep Listing.
Ser-
vice
Group
Service Group Description
Location
Assembly
Schematic
A
Turn-On Failures (Inguard. Outguard)
Paragraph 8-A-1
A1, AID
Inguard/Outguard Isolation
Outguard Troubleshooting
Paragraph 8-A-3
Paragraph 8-A-5
A1 A10
A1, A3
a
lr>guard Troubleshooting
Paragraph 8-A-6
AID, A14
6.7
A10 Board Troubleshooting
Paragraph 8-A-8
A10
5. 6. 7
A/0 Board Troubleshooting
Paragraph 8-A10
A10, A14
6. 6
Inguard/Outguard Transfer Troubleshooting
Paragraph 8-A-1 2
A1, A10
7.8
B
Auto-Cal and DC Troubleshooting (Inguard)
Paragraph 8-B-1
A10
Auto-Cal Constants
DC Inoperative
Paragraph 8-B-3
Paragraph 8-B-1 7
AID
A10
1
General Noise
DC Noise
Paragraph 8-B-30
Paragraph 8-B-32
A10
AtO
1
C
AC Convertor Troubleshooting
True RMS Convertor Servicing
Paragraph 8-C-1
Paragraph 8-C-3
A15
3
AC Noise
Paragraph 8-C-12
A15
3
Miscellaneous Troubleshooting
Paragraph 8-C-16
A16
3
Average Responding AC Convertor
Paragraph 8-C-1 7
A13
2
0
Ohms Troubleshooting
Paragraph 8-D-1
AID. A12
1,4
Ohms Noise
Paragraph 8-D-1 1
A10, A12
1, 4
E
A/D Convertor and Inguard Logic Troubleshooting
Paragraph 8-E-1
AID, A14
A/D Convertor Servicirig
Paragraph 8-E-2
A10, A14
6. 7
A/D Noise
Paragraph 8-E-8
A14
6
Inguard Logic Troubleshooting
Paragraph 8-E-10
A10
7
F
Outguard Logic Troubleshooting
Paragraph 8-F-1
A1, A3
8. 9. 10
Main Controller Troubleshooting
Paragraph 8-F-3
A1. A3
8
Front Panel Troubleshooting
Paragraph 8-F-4
At. A2
10
HP-IB Troubleshooting
Paragraph 8-F-8
A1
9
G
Miscellaneous Troubleshooting
Power Supplies
Paragraph 8-G-1
Paragraph 8-G-2
A10
1 1
Reference Assembly
Paragraph 8-G-3
A11, A20
5
Turn-Over Errors
Paragraph 8-G-4
A10. A14
1, 5. 6
Other Troubleshooting
Paragraph 8-G-6
A1. A3. A10
6, 11
H
Troubleshooting Diagrams
General Troubleshooting Diagram
Inguard Troubleshooting Diagrams
Outguard Troubleshooting Diagrams
Schematics
Paragraph 8-I-I-1
Paragraph 8-H-3
Paragraph 8-H-4
Paragraph 8-H-6
Figure 8-H-28
A1. A10
A10
A1
All
1 to 11
Group B): Use this service group if an OL (overload)
condition is observed at turn-on, or the instrument fails
its self-test (see paragraph 3-6), or the dc mode is in-
operative. A selMest failure is indicated if an integer
number or non integer number is displayed, when the
34S5A is in the self-test mode. A display of an integer
number indicates an Auto-Cal failure and if only a non
integer number is displayed, the failure is in the logic
circuits. Use the half-split technique to isolate the in-
guard and outguard logic sections and go to Service
Group E for the inguard logic troubleshooting and Ser-
vice Croup F for the outguard logic troubleshooting.
c. AC Convertor Troubleshooting (Service Croup
C): Use this service group if the ac function is defective.
Before using this service group, however, the instrument
should operate correctly in the dc function and Auto-
Cal mode.
d. Ohms Troubleshooting (Service Group D): Use
this service group if the ohms function is defective.
Before using this service group, the dc function and the
Auto-Cal mode of the 34SSA should operate correctly.
e. A/D Convertor and Inguard Logic Trouble-
shooting (Service Group E): This service group can be
used when it has been determined by the half-split
technique that the inguard section of the instrument is
defective. A faulty A/D Convertor or a faulty inguard
can also be determined by an indication of strange
readings on all functions and ranges. This service group
can also be used if a defective A/D board has been
8-38
Model 34S5A
TROUBLESHOOTING
Section VIII
isolated by substituting it with a good A/D board.
f. Outguard Logic Troubleshooting (Service Group
F) : This service group should be used if a defective
outguard section has been isolated by the half-split
technique. Helpful hints for the Signature Analysis (SA)
method are mainly given in this group.
g. Miscellaneous Troubleshooting (Service Group
G) : This service group can be used for troubleshooting
power supplies, reference assembly, turn-over errors,
and others. The troubleshooting information in this
group does not fit in the other groups.
h. Troubleshooting Diagrams (Service Croup
H): Troubleshooting Diagrams may be used to service
the 3455A in place of the other service groups. This
group also contains a detailed block diagram and all the
schematics of the circuits used in the instrument.
8-39
Section VUI
Model 345SA
SERVICE GROUP A
B-A-1. TURN ON CIRCUITRY (IN6UAR0 AND OUTGUARD).
8'A-2. Turn-On failures will show up as an inoperative front panel and a blank display. Because of
the RAM's timing, the LED's which first light up will vary with instruments and also on the same
34SSA each time it is powered up. Therefore the front panel will usually give no clues to the reason
for any turn-on failures.
B-A-3. Inguard/Qutguard Isolation.
8-A-4. Assuming that the power supplies of the 34SSA are good, the Instrument Half Splitting
Technique (paragraph 8-176) should be the first step in isolating turn-on failures. Either the inguard
or the outguard section could hang up the 343SA’$ turn-on sequence. The front panel indication does
not tell where the fault is located. Therefore, the Half-Splitting Technique should be used to isolate
the fault between inguard or outguard section of the 345SA. If an extra 3455A and an In-
guard/Outguard Service Cable is not available, the method described in Figure 8-45 may be used.
When it is determined which section of the 3455A is at fault, go to the appropriate troubleshooting
section in this service group (see paragraph 8-198 and Table 8-3).
B-A-5. Outguard Troubleshooting (Schematic B).
a. Check for a clock signal at A3TP5. If no signal exists or the signal level is below 4 V(peak to
peak), then troubleshoot the outguard clock circuit.
b. Add A1C46 (part number 0160-3622) if the 3455A does not have one (schematic 8).
c. Troubleshoot the outguard turn-on circuit (AIDS, U26, and associated components). Check for
a pulse at tum-on, as shown below, which can be seen at U26 pin 9. This pulse connects to inverter
U5 which holds data lines D2 through D7 low for the duration of the pulse. The processor should
turn on at the trailing edge of that pulse.
I 1"
"SV
I Li
)• - — 60-250mSeC *\
d. Check the Nanoprocessor interrupt circuit for correct operation. The IN ENA line should be
held high and the IN REQ line should either toggle from high to low to high, or remain high. If these
conditions do not exist, then troubleshoot the interrupt circuit (A1U46, U47, U53, and USS). The
turn-on circuit (AIU26) must be working before troubleshooting the interrupt circuit.
e. Using the Signature Analysis routines in Figure 8-H-20 to 8-H-27, troubleshoot the outguard
logic. If any difficulty is observed using the signature analysis routines, go to Service Group F,
paragraph 8-F-I for troubleshooting hints.
f. Using the information in Service Croup F paragraph 8-F-l, troubleshoot the outguard logic.
B-A-6. Inguard Troubleshooting ISchmatic 5, B, 7).
8-A-7. The Inguard Mother Board (AlO) and or the A/D Convertor Board (A14) may cause turn-on
failures. To isolate one from another swap a good A/D convertor board (A14) with the one in the in-
operative 345SA. If a known good A14 board is not available, use the one from the 34S5A which was
used in half-splitting the instrument.
8 A-8. A10 Motherboard Troubleshooting (Schematic 5, B, 7).
8-A-9. Use the following steps in the order they are presented to troubleshoot the Inguard Mother-
board (AlO).
8-40
Model 345SA
SERVICE GROUP A
Section VIII
a. Check for a clock signal at A10U26 pin 27. If no signal exists or the signal level is below 4 V
(peak to peak), troubleshoot the inguard clock circuit.
b. Check the ± 10 V reference voltages at AI0TP8 for + 10 V ± 100 /tV. and at A10TP7 for-IO V
± 20 mV (schematic 5). If these voltages are too low, the 34SSA may not complete the Auto-Cal
routine and lock up.
c. Pin 29 of A10U26 should, under normal condition, be toggling. At tum-on it should have a 20
msec negative going pulse. If these signals are not present, then troubleshoot the inguard processor
turn-on circuit. This circuit consists of U24, U19, U9, and their associated circuits. Normally U9 pin
11 should have a 2 V signal with some ripple and about 1.2 V at pin 10. At turn-on UI9 pin 2 should
have the approximate pulse as shown below.
d. A 300 nano second negative pulse for each interrupt should be observed at U32 pin 4. Since it is
difHcult to observe the pulse, this interrupt circuit can be checked by manually clocking TP 10. Utis
can be achieved by pulling TPIO low and then releasing it. U26 pin 29 should then toggle. If no toggl-
ing is taking place, troubleshoot the interrupt circuit consisting of U32A and U27. If there is toggling,
check T2 or the outguard section (Al).
e. Check for an A/D waveform (see Service Group E). If none is present, toggle TPIO again and
look for an A-D waveform. If the waveform appears, then troubleshoot the interrupt circuit con-
sisting of U32A and U27.
f. Check for toggling outputs on pins 2, 4, 6, 8, 10, and 12 of U22.
g. The outputs (pins 9 to IS) of U14 should also toggle with 500 nano second wide negative pulses.
h. Check operation of latches Ull to UI3, UlS to U17, and ROM U2S.
i. Make sure that the zero detea signal (U32B pin 12) is not loaded down by anything on the AIO
board.
8-A-10. AID Board Troubloahooting (Schamatic 5, 61.
8-A-l 1 . A couple of checks can be made to troubleshoot the A/D board (A14). One check is to make
sure that the ± 10 reference voltages are correa. A10TP8 should be 10 V ± 100 and A10TP7
should be • 10 V ± 20 mV. Another check, is to make sure that there is a zero detect signal at A14 pin
S. If these checks are good and the 34SSA is still inoperative, go to Service Group E for further
troubleshooting.
8-A-12. InguardlOutguard Transfer Circuit Troublashooting (Schamatic 7, 8).
8-A-I3. At turn-on the outguard processor starts the operation of the inguard processor. The in-
guard then enables the outguard. Since timing is very critical, the Inguard/Outguard Transfer circuit
may cause turn-on failures. Depending on where the failure is located, it could show up as either an
inguard or an outguard malfunaion. When half-splitting the 34S5A, the following checks should be
made to troubleshoot the transfer circuit.
a. The signals at A10U26 pins 34 to 37 (inguard) should be the same as those on A3TP4 to TPI
(outguard). The only exception is the signal at A3TP 1 . This signal should be the same as the signal at
A10U28 pin 9. if the signals do not agree, check for malfunctions in the inguard light isolators
8-41
Section Vlll
SERVICE GROUP A
Model 3455A
A10U34 and U3S, plus associated circuits. Lines F0 and FI transfer data from outguard to inguard
F0 is the data transfer line and FI is the data transfer rate line), while F2 and F3 send data from in-
guard to outguard (F2 is the handshake line and F3 is the data transfer line).
b. HAZ line must be high, if not. check TPIO.
c. Use the Inguard/Outguard transfer circuit troubleshooting diagram (Figure 8-H-17) for further
troubleshooting.
d. The inguard power supply regulators (10U36 to U39) can also cause transfer problems. The
outguard should power up after the inguard. Check for a slow (more than 2(X1 msec) inguard power
supply.
8-42
Model 3455A
Section VIII
SERVICE GROUP B
8 B-1. AUTO-CAL AND DC TROUBLESHOOTING (INGUARD).
8-B-2. All 3455A input signals travel through the main dc ampliner and Auto-Cal circuits. In order
to troubleshoot D.C. and Auto-Cal malfunctions, a good fundamental knowledge of the 3455A’s
Auto-Cal and self-test routines are required.
B-B-3. Auto-Cal Constants.
8-B-4. There are 14 cal constants used in the 34SSA, which are usually zero and full scale voltage
“readings”. These account for most offsets, gain, and drift of the input op-amps. The “readings”
are taken periodically when the 3455A is in the Auto-Cal mode. A condensed description of all the cal
constants are in Table 8-B-I. If a more detailed description of the cal constants is desired, refer to the
appropriate paragraph in the Theory of Operation section of this manual.
Table 8-B-I. Aute-Cal Constants
Coutul
N'aoibtr
CoBsiani Oncriplioo
Circa its
Used
Detailed
Ooe ration
13
lo. no Inout - A/D oHsei measurement
Fsrsoraoh 8-4S
12
l±.lratio-± 10 V reference input, A/D
current ration measurement.
—
Paragraph 8-46
1 1
10 V offset - XI gain with amplifier input
tied to grourtd. Input attenuator at XI
asm.
Figure 8-B-I
Paragraph 8-24
10
10 V jain - XI gain with amplifier tied to
10 V reference. Input attenuator at XI
gain.
Figure 6-8-2
Paragraph 8-27.
9
Ohms and .5 V offsets - X20 gain with
amplllier input tied to grourtd. Input anen-
tuator at XI gain.
Figure 8-B-3
Paragraph 8-39
8
Ohms and 5 V offsets — X2 gain with
amplifier input tied to ground. Input et-
tenuator of XI gain.
Figure 8-B-4
Paragraph 8-39
7
100 V offset #2 (XI) - gain with amplifier
input tied to 10:1 attenuator with top of
10:1 attenuator tied to ground.
Figure 8-B-5
Paragraph 8-26
6
1000 V Offset - X1 gain with amplifier
tied to 100:1 attenuator with top of
100:1 attenuator tied to ground.
Figure B-B-6
Paragraph 8-26
5
1 00 V gain • X 1 0 gain with amplifier tied
to 10:1 attenuator with top of 10:1 at-
tenuator tied to X10 V reference.
Figure B-B-7
Paragraph 8-31
4
100 V offset ei 1X10) • X10 gain with
amplifier input tied to 10:1 attenuator
with top of 10:1 attenuator tied to
ground.
Figure 8-B-8
Paragraph 8-33
3
.1 V offset -X100 gain with amplifier in-
put tied to ground. Input attenuator of X 1
gain.
Figure 8 B 9
Paragraph 8 26
2
1 Voffsetfl -X10 gain with amplifier in-
put tied to ground. Input attenuator of XI
gam.
Figure 8-B-IO
Paragraph 8-25
1
1 V offset «2 -X 10 gain with amplifier in-
put tied to 10:1 divider. Top of divider
shorted to ground. Input attenuator at XI
gam.
Figure 8-B-1 1
Paragraph 8-30
0
1 V gain -X10 gain with amplifier tied to
10:1 divider with 10 V at the top of the
divirfer. Inout attenuator at X gain.
Figure 8-B-I 2
Paragraph 8-28
8-43
Section VIII
SERVICE GROUP B
Model 3455A
8-B-5. When pressing the TEST button of the 3453A, each cal constant is measured. The first cons-
tant measured is constant number 13. If constant 13 is within certain limits (which are internally set)
the 3453 A will automatically measure the next constant. If constant 13 is out of its limits the self test
operation will stop. A number 13 will be displayed on the front panel of the 3433A. In order to
measure the next cal constant, the TEST button needs to be pressed again. If all the cal constants are
good, a logic check will be performed. The 34S3A will then display + .8.8. 8. 8.8. 8. 8 when the self-test
operation is completed. After the self-test operation is finished it will automatically start again. To
bring the 3433A out of this loop, any function key other than TEST needs to be pressed.
8-B-6. When the 3433A is in the self-test mode, and it fails this test, it will stop and display an integer
number. This number is the number of the cal constant that fails. To continue the self-test operation,
press the TEST button again. After all the cal constant measurements arc taken, and the 3433A is still
in the self-test mode, another measurement is taken. A dummy cal constant calculation is performed
in the outguard section of the 3433A. If this calculation is correct (answer should be 10), nothing will
be displayed. The instrument will then finish the self-test operation. If the dummy calculation is in-
correct, a non-integer number (e.g., 9.998 or 10.002) will be displayed on the front panel. Again, to
continue the self-test operation the TEST button needs to be pressed.
8-B-7 When the 3433A is used with the HP-IB system and if any of the cal constants fail, the 3435A
will not output any readings. If only the dummy calculation fails then the dummy calculation answer
will be output on the bus. If the 3433A passes its self-test then a 10 will be output on the bus.
8-B-8. The 3433A should not be troubleshoot for Auto-Cal malfunctions in the self-test mode. If any
cal constants fails, including the dummy constant, use the cal constant service procedure (paragraph
8-B-lO) for troubleshooting. If only the dummy constant fails try replacing the ALU’s (A1U28, 30),
and their associated circuits, in the outguard section (schematic 8). If the dummy constant still fails,
go to the Outguard Troubleshooting Service Croup (Service Group F).
Figure 8-B-L AutoXil Conmnt «11 (10 V OHsat).
Figure 8-8-2. Auto-Cel Constant #10 (10 V Gain).
8-44
Model 3455A
SERVICE GROUP B
Section VIII
Figure B-B-3. Aute-Cal Contunt US {10 K, 100 K. aid 10 M Offsau).
Figure 0 0-4. Auto-Cel Cenetant #8 (10 K. 100 K, and 10 M Offtets).
8-45
Section VIII
SERVICE GROUP B
Model 3455A
Figira 8-B-S. Aute Cil ConsUnt D>7 (100 V OHsat #2).
Figure 8-B-6. AutoCal Constant Mt 11000 V Offut).
8-46
Model 3455A
SERVICE GROUP B
Section Vlll
Figure 8-B-7. Auto Cal Constant (100 V Gain).
Figure 8-B-8. Aulo-Cal Consunt #4 (100 V OHset #t).
8-47
Section Vill
SERVICE GROUP B
Model 3455A
Figure 8-B-9. Auto-Cel Conttent #3 (.1 V Offset}.
Figure B-B-10. Auto-Cel ConsUnt #2 (1 V Offset #1}.
8-48
Model 345SA
SERVICE GROUP B
Section VIII
Figure 8-B-11. Auto Cei Constant #1 (1 V OHMt HI].
Figure B-8-12. Auto-Cel Constent #0 II V 6ein|.
8-49
Section VIII
SERVICE GROUP B
Model 3455A
8 B-9. Auto Cal Switch Closures. (Schenfatic 1, 5, 6, 7).
8-B-lO. Various tables are included in this service group which can be used as troubleshooting aids
for Auto-Cal failures. Table 8-B-2 shows the closed switches for the measurement of Auto-Cal cons-
tant 1 1 to 0. The function of several gates used in the Auto-Cal mode of the instrument are shown in
Table 8-B-3. To find the switch drive voltage levels for Auto-Cal constants 13 to 0, Table 8-B-4
should be used.
B-B-11. Cal Constants Service Procedure.
8-B-12. When the 34S5A is in the Auto-Cal mode, the instrument measures one or more cal constant
between each sample. The number of cal constants measured depends on the sample rate. In order to
reach a certain cal constant measurement, use the following procedure.
a. Press the DCV and HOLD/MANUAL buttons and then the AUTO CAL button of the 3455A.
The instrument should now be stopped at a certain cal constant.
b. Make sure the 34SSA is out of the Auto-Cal mode. Press the AUTO CAL button again, if
necessary (the light in the AUTO CAL button should be ofO-
c. To locate the desired cal constant or to go through the cal constants completely, briefly press the
AUTO CAL button twice to turn Auto-Cal on and off. Each time Auto Cal is turned on and off, the
Auto-Cal circuitry will attempt to decrement through the cal constants from 13 to0, and the return to
constant 13.
NOTE
The A UTO CAL button should not be pressed on and off too fast or loo
slow, because the3455A may remain in the same cal constant or advance
past more than one cal constant. A few tries may be necessary to decre-
ment one cal constant step each time.
Table 6 B-2. Auto Cal Switch Closures.
Test
11
ID
9
8
7
6
5
4
3
2
1
9
A10Q2
X
X
X
X
X
A 1004
“3^
A10Q1S
X
X
X
A10Q16
X
X
X
A10Q18
X
X
A10O19
X
X
X
X
A10O21
1
it
X
X
X
X
X
A 10023
X
X
A10Q27
X
X
A10O28
X
X
A10O29
X
A10Q31
X
A 10032
X
A10Q33
X
A10O34
X
X
X
A10Q3B
T
It
X
A10O36
X
A 10038
X
X
X
X
A10Q39
X
A10040
X
A10K6
X
X
5
X
X - Closed (ON)
8-50
Model 3455A
SERVICE GROUP B
Section VIII
Table B B-3. Gate Function in Auto-Cal.
Gates
UtcO
Faaclfon
Q19
XI Gain
021
X10 Gain
022
X2 Gain
028, 026
XI Suffer
029, 031, 032
TV Referertce
036
10:1 Input to Ground
018
+ 100 Gain
038
10:1 Victual Ground
039
100:1 Attenuator
03S
10:1 Attenuator
016
10:1 Attenuator to Input
016
100:1 Attenuator to Input
033
+ V Reference to Attenuator
034
Attenuator Input to Ground
02
Low Voltage input to Ground
04
+ V Reference to Input
Table B-B4. Switch Driver Voltage Levels.
—
Pin
Test
Pin
Oesignalor
No.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
No.
U4
1
0
0
0
a
•24
-24
-24
-24
9
9
9
9
9
9
1
2
-24
-24
•24
•24
-24
•24
-24
•24
9
9
-24
-24
-24
•24
2
S
L
L
L
L
L
L
L
L
H
H
L
L
L
L
5
7
H
H
H
H
L
L
L
L
H
H
H
H
H
H
7
9
L
L
L
L
H
L
H
H
L
L
L
L
L
L
9
10
L
L
L
L
H
L
H
H
L
L
L
L
L
L
to
13
■*9.5
■•9.5
♦9.5
♦9.5
•24
♦9.5
-24
•24
*9.5
♦9.5
+9.5
+9.5
+9.5
+9.5
13
14
-24
-24
-24
•24
9
•24
9
9
-24
-24
-24
•24
-24
•24
14
US
1
-24
•24
-24
•24
•24
•24
24
•24
•24
•24
-24
•24
-24
•24
1
2
-24
-24
-24
0
-24
•24
•24
•24
•24
9
-24
-24
-24
-24
2
S
L
L
L
H
L
L
L
L
L
H
L
L
L
L
5
7
L
L
L
t
L
L
L
L
L
L
L
L
L
L
7
9
H
H
H
L
H
H
L
L
H
L
L
L
H
H
9
11
L
L
L
L
L
L
H
H
L
L
H
H
L
L
11
13
-24
-24
-24
-24
-24
•24
9
9
-24
-24
♦9.9
9
•24
-24
13
14
■H
0
9
•24
9
+1
-24
-24
9
•24
•24
•24
♦1
♦ 1
14
U6
1
■►1
0
-24
•24
•24
•24
9
•24
•24
-24
24
•24
♦1
+1
1
2
•24
-24
•24
9
•24
•24
•24
-24
•24
9
•24
•24
•24
-24
2
5
L
L
L
H
L
L
L
L
L
H
L
L
L
L
5
7
H
H
L
L
L
L
H
L
L
L
L
L
H
H
7
9
L
L
L
L
L
L
H
L
L
L
L
L
L
L
9
11
L
L
L
L
L
L
L
L
L
L
H
L
L
L
11
13
•24
-24
-24
-24
-24
•24
-24
-24
•24
•24
♦9.9
•24
-24
-24
13
14
•24
-24
•24
•24
•24
-24
9
-24
•24
•24
-24
•24
•24
-24
14
U8
1
•24
-24
•24
-24
•24
•24
•24
•24
•24
•24
24
•24
-24
•24
1
2
•24
9
•24
•24
•24
-24
9
24
•24
24
-24
•24
-24
24
2
4
H
L
H
H
H
H
L
H
H
H
H
H
H
H
4
7
L
1
L
L
L
L
L
L
L
L
L
L
L
L
7
9
L
L
L
L
L
L
L
L
L
L
L
C
L
L
9
11
B
B
H
H
8
8
B
B
H
H
B
H
L
L
11
13
•24
•24
9
9
•24
•24
•24
•24
9
e
•24
9
-24
•24
13
14
•24
•24
•24
•24
•24
-24
-24
•24
-24
-24
•24
•24
•24
•24
14
U9
1
-24
-24
-24
•24
9
-1
•24
9
•24
-24
24
24
■24
•24
2
2
•24
•24
-24
•24
•24
-24
•24
•24
•24
-24
•24
•24
•24
•24
2
S
L
L
L
L
L
L
L
L
L
L
L
L
L
L
5
7
L
L
L
L
H
H
L
H
L
L
L
L
L
L
7
9
H
L
L
L
L
L
L
L
L
L
L
L
H
H
9
11
H
H
H
H
H
H
H
H
H
H
H
H
H
H
11
14
«9.5
-24
-24
•24
-24
-24
-24
•24
•24
-24
-24
•24
+9.5
+9.5
14
The symbol* L and H refer to TTL loflic levels where L is < B V dc and H is > 2.2 V dc.
8-51
Section VIII
SERVICE GROUP B
Model 3455A
d. To determine which cal constant is measured, connect a high input impedance DVM (10 V
range input impedance > IO>o ohms) to one of the points shown in Table 8-B-5.
e. By stepping through the cal constants from constant 13 to 0 and monitoring one of the
points in Table 8-B-S, every cal constant step can be located.
NOTE
The voltages listed in Table 8-B-5 are approximate and should only
be used to locate Auto-Cal constants and for troubleshooting.
8-B-13. By using the cal constants stepping procedure in conjunction with Table 8-B-5, any
one constant step can be located. When using this method and the 345SA is malfunctioning,
or possibly two conditions in Table 8-B-4 may be inoperative. (Example; Readings at
A10TP4 and TP2 are bad). It is very unlikely, however, that all four conditions are in-
operative. If this should occur, then check the + 10 V reference and/or the inguard logics.
Table 8-B S. Cal Constant Monitoring Points.
13 12 11 10 9 8 7 6 5 4 3 2 1 0
Approximate A 1 0TP4
Voltage
Voltage at the Multiplexer
Mode (Source of A10QY)
Voltage at the Junction of
A10K6 and A10R47
A10TP2 Voltage
0 0 0 10 0 0 0 6 -10 0 0 0 0 10
- - - 10
----- - - - -9.9009 -
® ® -
8 B-14. Switch Closure Table.
8-B-15. Most of the switch closures used in the 345SA are listed in Table 8-B-6. This table lists the
previous closures dependent on the range, function, and Auto-Cal mode of the 34SSA. For
troubleshooting malfunctions of the various operations of the instrument, this table may be very
helpful.
8 B-16. Auto-Cal Troubleshooting (Schamatie 1, 7).
8-B-17. Most Auto-Cal failures also show up as dc failures and should be repaired first. These
malfunctions usually show up as a failure in the self-test mode of the 345SA. The following are a cou-
ple of hints to troubleshoot these malfunctions.
a. Set the 3455A to the self-test mode and find out which cal constants are failing. Take the 3455A
out of the self-test mode (press any other function button). Using the cal constants service procedure,
go to the bad cal constant. While refering to the various tables and figures in this service group,
troubleshoot the bad constant.
8-52
5? S S 5? S
Model 3455A
SERVICE GROUP B
Section VllI
Table 8-B-6. 3455A OVM Switch Closures.
DtV)C« Sc»«ct •
AIOUW
Ot*nc« SH«ct 7
A10U16
Switetted
Compor>««t
SwMChin^
Lin4
2 g<U<BO<EO 3 S 3
5 '2 X y S a
5 f I ! i !
n*A«*
Op*raiiQn
1
ACF«$i
0
1
0
1
0
0
10
ACPMt
0
1
1
1
0
0
100
AC-P«1
0
0
0
1
1
0
1000
AC F«it
0
0
1
1
1
0
1
AC*Norm
0
1
0
1
0
1
10
AC'Norm
0
1
1
1
0
1
100
AC*Nom>
0
0
0
1
1
1
1000
ACNprm
0
0
1
1
1
1
1
0 1
0
1
0
0
0
X
0
0
1
0 1
0
1
0
1
0
X
0
0
0
1
0 1
0
1
0
0
0
X
1
0
0
0
0 1
0
1
0
0
0
0
1
0
0
0
0 1
0
1
0
0
0
1
1
0
0
1
0
1
0
0
0
X
0
0
1
0
1
0
1
0
1
0
X
0
0
0
0
1
0
t
0
1
0
X
0
0
0
0
1
0
1
0
1
0
X
0
0
0
0
t
0
t
0
1
0
X
0
0
0
0
1
0
1
0
0
0
X
0
0
1
0
1
0
1
0
0
0
X
0
0
1
0
1
0
1
0
1
0
X
0
0
0
0
1
0
1
0
1
0
X
0
0
0
0
1
0
1
0
1
0
X
0
0
0
0
1
0
1
0
1
0
X
0
0
0
0
1
0
t
0
0
0
X
0
0
t
0
1
0
1
0
0
t
0
1
0
0
}
0
1
0
0
1
0
1
0
0
1
0
1
0
0
t
0
1
0
0
1
0
1
0
0
1
0
1
0
0
t
0
t
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
0
X
0
0
1
1
0
X
0
0
0
1
0
X
0
0
0
1
0
X
0
0
0
1
0
X
0
0
0
0
0
X
0
0
1
0
0
X
0
0
1
1
0
X
0
0
0
1
0
X
0
0
0
1
0
X
0
0
0
1
0
X
0
0
0
0
0
X
0
0
1
Not* X lAdtuwt “Oon'l Cart "
0 l«HOt*t«t (0** tttf COAICOI ••A* will be HI ot* Hro* •> tfll cKior rn**>ur*m«nt tttt*
8-53
Section VIII
SERVICE GROUP B
Model 3455A
b. If unable to repair the Auto-Cal failure, Table 8-8-6 may be helpful if applicable. The dc in-
operative section paragraph 8-B-18 in this service group may also be helpful.
8 B-1B. DC Inoperative (Schematic 1).
8-B-I9. When the dc function of thO 34SSA is inoperative, it can also show up as an Auto-Cal
failure. These failures should be serviced using the information in paragraph 8-B-3 to 8-B-lS in this
service group. Some of dc and Auto-Cal failures may be serviced by using the following procedures.
Table 8-B-7. Possible Aute-Cal Failure Causes.
Cal Constants Failed
3455A Display
Possible Cause
13 12
1 1
10
9
8
7
6
5
4
3
2
1
Shorted A14U1d
12
10
5
4
3
0
.0757
Open A1 4C2
12
9
5
4
3
A10Q36 Shorted
1 1
10
9
8
7
6
5
4
3
2
1
0
.0007
Gate Bias
1 1
10
9
8
7
6
5
4
3
2
1
0
.0000
DC Pre-amp
1 1
10
9
8
7
6
5
4
3
2
1
0
.0074
DC Pre-amp
11
9
8
7
6
5
4
3
2
1
0
9.8438
A10Q4 Shorted
1 1
10
7
6
.0000
A10Q19 Open
1 1
9
8
3
2
A10U3
10
9
5
3
9.7650
A 10Q 16 Shorted
10
5
0
.0000
A14Q3 Open
10
9
3
0
A10Q15 Shorted
10
6
5
1
0
A10Q18 Shorted
10
9
5
0
9.5703
A10Q2 Shorted
10
2.5026
A10Q4 Open
10
9
8
3
2
A10Q21 Shorted
A 1002 Open
9
7
6
5
4
3
1
0
A10U18 or A10037
9
7
6
5
4
3
1
0
Reference Supply
9
7
6
5
4
3
2
1
0
A 1002 9 and/or A 10031 Shorted
9
5
3
0
A 1003 9 Shorted
9
3
A10U3 or Open A100A18
9
3
0
A10035 Shorted
9
A10Q27 Open
9
8
5
4
2
1
0
A10027 Open
A 10021 Open
7
5
4
0
A 1002 7 Shorted
7
5
4
A10O15 Open
7
6
4
1
0
A10Q3 Shorted or A10K5 Open
A10O16 Open
5
4
0
A10Q28 Shorted
5
0
A 1 002 2 or A 1 00 1 9 Shorted
5
A10035 or A10K6 Open
5
6.7542
A 1 0033 Open or A 1 0038 Shorted
A14 Board or A10034 Shorted
X.XXXX
Where X is any number go to Service
Group 6
B-6-20. Leakage and Other Various Malfunctions.
8-B-21. The following quick leakage test may be used to isolate most leakage failures.
a. Set the 3455A to the DCV function 10 V range, with Auto-Cal off.
b. Short and then open the input terminals of the instrument and note the change in readings on
the display.
8-54
Model 345SA
SERVICE GROUP B
Section VIII
c. If the reading changes faster than .25 V per second, there is leakage on the multiplex node. If
the reading on the display changes positively, either AlOQS or Q17 may be leaky. If the change is
negative, A10Q2, Q3, Q4, Q13, QIS, or QI6 may be leaky.
8-B-22. The test in the above paragraph, paragraph 8-B-21, is a quick leakage test and should find
most leakage failures. A more thorough test involves checking zero and full scale voltages on all dc
ranges. Start with the 10 V range and the other ranges in the following order: 1 V, 100 mV, 100 V,
and 1000 V ranges. The following paragraphs contain the procedures which should be used for
leakage failures.
B B-23. 10 V Ranga or Constant 10 and 11 Fail.
a. Set the 34S5A to the 10 V range. Auto-Cal on and short the input terminals. If the reading on
the display is positive (more than 5 counts), AlOQl may be leaky. If the reading is negative (more
than 5 counts), Q2 may be leaky. To doublecheck for a defective Q1 and Q2, note the reading on the
I V and 100 mV ranges. The bad reading should also be present on those ranges.
b. Apply + 10 V or -10 V to the input terminals of the 345SA. Make sure the readings are within
specification. Check the reference voltages and adjust them, if necessary. A10TP8 should be -f 10 V
± 100 pV and TP7 should be • 10 V ±20 mV. If the reference voltages are good and the instruments
readings is low, A10Q4 may be leaky.
B-B-24. 1 V Range or Constant 0, 1, and 2 Falls.
a. For the 1 V range check, do the procedure as explained in paragraph 8-B-23a.
b. For the 1 V range full scale check, do the following:
1 . With the 34S5A set the 1 V range and Auto-Cal off, apply -f 1 V to the input terminals. A
voltage of -f 1 V should appear on the multiplex mode and -t- 10 V should be at A10TP4. If the
multiplex mode reading is bad,' troubleshoot the input circuit. If the reading at TP4 is bad,
make sure A10Q21 is turned on. Check for leaky Q22, CR12, CR13, or a defective U3. If TP4
reads good, set up the 34S5A for the self-test mode by pressing the TEST button. Check for cal
constant 0 failing and if it does, troubleshoot the failure by using the procedure of paragraph
8-B-lO. Continue with the next step if constant 0 does not fail.
2. By using the procedure of paragraph 8-B-lO, step to cal constant 0. Adjust the active at-
tenuator for a zero reading, as read at AlOTPl (adjust R66). Measure the voltage at J3 pin 9 for
exactly -t- 1 V. If the reading is low, Q39 or Q18 may be leaky. If the reading is good, check the
operation of Q36. This can be done by changing the high voltage amp offset. The 1 V reading at
J3 pin 9 should change, because the gain of the I V range is changed.
B-B-25. 100 mV Range or Constant 3 Fails.
a. For the 100 mV range zero check, do the procedure of paragraph 8-B-22a.
b. For the 100 mV range full scale check do the following:
1. Apply + 100 mV to the input of the 3455A. The instrument should be set to the 100 mV
range with Auto-Cal. Measure for approximately -t- iO V at AI0TP4 and 1/10 of this voltage at
TPS. TP2 and TP6 should read approximately the same as TP5. If the reading at TPS and TP6
are incorrect, check the power supplies of U3 (pins 4 and 7). The supplies should have approx-
imately the voltage at TP6 ± 5 V. Troubleshoot U3 and associated circuitry if necessary.
2. Adjust the high voltage amp (A10U18) to zero, as read at TPl (adjust R66). Measure the
voltage at the 10:1 divider (J3 pin 9) for exactly 1/10 the voltage at TP2. If this voltage is incor-
rect, QI6 or Q2I may be leakly.
B B-2B. 100 V Range or Constants 5, 4, and 7 Fail.
a. The active attenuator can be checked by applying -i- 10 V to (he input of the 34SSA. With the in-
8-55
Section VIll
SERVICE GROUP B
Model 3455A
strument set to the 100 V range and with Auto-Cal on, measure for any readings at AtOTPl. If this
voltage is incorrect, check the bias of the input FET’s by shorting the drains of Q38 to the sources of
Q38. TPl should now read zero. The drains of Q37 should be approximately + 10 V and the sources
of Q3 should read between + 1 V and + 2 V. Troubleshoot the active attenuator, if the readings are
bad.
b. For the 100 V range zero check, set the 34S5A to the 100 V range with Auto-Cal off. Adjust R66
for a zero reading at TPl. If unable to adjust for a zero voltage, check for a leaky C21, C22, C26,
CR32, or Q37. If the zero reading is good, the 34S5A should display 0 V ± 1 count, a short time after
Auto-Cal is turned on. If an offset remains on the display, Q36 may be defective.
c. For a 100 V range full scale check, observe for a cal constant 5 failure, when the 34S5A is in the
self-test mode. If cal constant 5 fails, troubleshoot its circuitry by using the procedure of paragraph
8-B-l 1. If cal constant 5 passes, step to cal constant 5 by using the procedure of paragraph 8-B-I I. If
cal constant 5 passes, step to cal constant 5 by using the procedure of paragraph 8-B-l I. Measure
TP2 for approximately -1 V and measure for approximately -.1 V at the 10:1 divider (pin 9 of J3).
Check for exactly -i- 10 V at the Junction of R47 and Q33, and for + 9.9 V at the junction of R47 and
K6. If 10 V is measured at R47 and K6 instead of + 9.9 V or R63 may be open.
8 B-27. 1000 V Range or Constant 6 Fails.
a. For the 1000 V range zero check, remember that some of the same circuits are used in the 100 V
range. The 100 V range zero and gain should be working before troubleshooting the 1000 V range.
Check for the proper switch closures used in cal constant 6 (use the procedure of paragraph 3-B-1 1 to
locate constant 6).
b. For a 1000 V gain check, use the procedure of paragraph 8-B-24b.
c. Set the 34SSA to the 1000 V range with Auto-Cal on, and apply 1(XX) V to the input terminals. If
the reading on the display changes intermittently from 100 counts to 200 counts, A10K5 or K6 may be
breaking down. KS and K6 can be checked by connecting channel A of an oscilloscope (set to 20
V/div) at the Junction of R47 and K6.
WARNING
For safely, connect the scope probe lo the 100 K resistor R47.
Connect channel B of the scope (2 V/div) to pin 10 of U24. Set the scope to the chop mode and trig-
ger on channel B. If channel B indicates a 5 V spike when arcing occurs, as seen on channel A, then
K6 may be breaking down. If the indication on channel B appears to be good, KS may be defective.
C21, C23, or the input node of Q37, may also be defective.
8 B-2B. Various Other Malfunctions.
8-B-29. Shorted FET’s.
a. Occasionally FET’s on the multiplex node may short. Two ways can be used to isolate shorted
FET’s.
1. Measure the gate to on resistance with an ohmmeter.
2. Short the input of the 34SSA and turn the high resolution and Auto-Cal functions off.
While monitoring A10TP3 step through all the dc ranges (1 V, 10 V, etc.) and ac functions.
Make sure Auto-Cal is turned off after every range and function change. If TPS dips to -24 V, a
FET may be shorted. Usually, the defective FET is normally turned off in that particular range
or function.
b. If AlOUl gets very hot Ul, Q2, Q13, or Q14 could possibly have their gates shorted to their
can.
8-56
Model 3455A
SERVICE GROUP B
Section VIll
c. Shorted FET's and U! may show up as on "OL” indication on the display of the 3455A. This
condition can be checked by measuring the voltages at TP4. If the voltage reads approximately + 16
V or -16 V, then measure TP3. If TP3 appears to be floating or is at a -24 V level, short the multiplex
node to ground. If the “OL" condition disappears, a FET on the multiplex node is shorted. Use the
procedure of paragraph 8-B-29a, b to rind the shorted lET. Some possible.FET failures may be Q3,
Q4. Q15. Q19, or Q21.
6-B-30. Other Troubleshooting Hints.
a. If either A10K5 or K6 slicks closed, it may damage the other relay. Both should be replaced.
b. A sticking KS could also damage R47, when K6 closes.
c. If 9.9009 V is displayed on the 100 V and 1000 V ranges of the 3435A with the input open,
A10K6 is probably shorted.
d. AlOLl should not be too close to R63. Arcing could occur for 1000 V inputs.
e. With Auto-Cal on and A10R66 adjusted, the instrument should temporarily indicate an offset
on either the I V, 100 V, or 1000 V ranges. If the offset remains, Q36 may be open.
f. If all tests pass and the 100 mV range is out of tolerance, then AI0Q28 may be open.
g. If all tests pass the 34SSA reads zero volts on the 1000 V range with an input voltage, Q39 may
be open.
h. If all tests pass and then 100 mV, 1 V, 100 V, and 1000 V ranges are out of tolerance, then
AI0Q29 or Q31 may be open.
i. If all tests pass and the 100 V and 1000 V ranges are out of tolerance, then A10Q4 may be open
or K6 may be shorted.
j. If Auto-Cal constant S fails and the 100 V and 1000 V ranges are way out of tolerance, then
A10R46 or R63 could have changed value.
k. If 17 V appears on the multiplex node, check for a defective A10Q15, Q18, CR12, or U12.
8 B-31. General Noise.
8-B-32. Noise in the 34S3A may show up in one or more functions. If more than one function is
noisy it usually indicates dc noise. The dc noise source should be found first, before troubleshooting
any ac or ohms noise. Go to Table 8-3, to find the correct service group for ac and ohm noise.
8-B-33. DC Noise (Schematic 1, 5, and B).
a. Equal amount of noise on all ranges: Noise of this nature is usually caused by the output of the
dc amplifier (A10U2), the reference assembly (All or A20), or the A/D convertor (A 14). The follow-
ing two methods can be used to find noise causing circuits.
1. Try replacing the A/D convertor board (AI4) with a known good one. If the noise disap-
pears, go to Service Group E paragraph 8-E-14 for further troubleshooting. If the noise is still
present or a good A/D board is not available, use the next procedure.
2. Set the 3435A to the 10 V with Auto-Cal off. Using a high impedance DVM (10 V input
impedance > 1010 ohms), measure the 10 V reference at A10TP8. If the reference voltage is
noisy, replace the reference assembly (All or A20). If TPS is good, unsolder R38 at the
multiplex node. With a clip lead, connect TPS to the unsoldered end of R38. Measure the
voltage at TP4. If TP4 is noisy, U2 and its output circuit may be noisy. If the voltage at TP4 is
quit, the A/D convertor is most likely noisy. Go to Service Group E paragraph 8-E-14 for fur-
ther troubleshooting.
8-57
Section VIII
SERVICE GROUP B
Model 34S5A
b. Noisy on all ranges.
1. Check the + 10 V reference voltage at A10TP8.
2. Check all inguard power supplies for oscillations. Clock ringing bn the supplies are nor-
mal and should be ignored. A defective AIOU36 may be noisy.
c. Noise on positive input voltages only: Check the -10 V reference voltage at A10TP7 for noise.
The 34SSA should be in HOLD/MANUAL and with Auto-Cal off. The noise should not be greater
than the + 10 V reference noise measured at TPS. If the -10 V reference is too noisy, replace U7.
d. Readings at 1/10 scale noisy and several counts low on any range: A14C2 may be defective.
e. Noise on the 100 mV range; Short the input of the 3455A with Auto-Cal off. Measure the
voltage level at AlOTPl. It the voltage is noisy, try replacing R69, R71, U18, or Q37. If TPl is not
noisy, measure with a DVM across TPS and TP6. The low input of the DVM should be connected to
TP6 and the high input to TPS. If excessive noise is measured, replace U3.
f. Noise and S counts to 10 counts turnover on the 1 V range: Replace A10R41 to R43.
g. 1000 V dc noisy; AlOKS, K6, or R63 may be arcing inside. If KS or K6 are replaced, replace
both of the relays.
h. Various other possible noise repairs.
1. AI0Q7 or Q8 may occasionally oscillate. Care should be taken when measuring with an
oscilloscope. A probe connected to the output of U2 or the emitter of Q7 may cause oscillation.
2. A10U2 or QiS may also cause noise.
3. Clean the front/rear input switch (SI).
8-58
Model 3455A
SERVICE GROUP C
Section VIII
8 C l. AC CONVERTOR TROUBLESHOOTING.
8-C-2. True RMS Convtrtor Sarvieing (Schamatic 3).
8-C-3. Before troubleshooting the 345SA's True RMS Convertor, the instrument should operate
properly in the dc mode. Verify for the correct operation of the dc section, before servicing the ac
convertor. The following procedure should be followed before troubleshooting or repairing the ac
convertor.
a. Check the dc operation of the 3455A. Verify for correct full scale and zero scale readings on all
ranges.
b. Set the 34SSA to the 10 V range, ac function, and short the input.
c. Check for approximate zero levels at A1STP8 and TPS, with the low input of the meter con-
nected to TP6 (go to paragraph 8-C-4 or 8-C-6 if bad).
d. Short TP3 to TP6 and measure the voltage at TPI. TPl should read approximately zero.
Remove the short (go to paragraph 8-C-8 if bad).
e. Check for proper biasing of A1SU2. The voltage at U2 pin 2 should be between -2 mV and -3
mV. Repad R2I if necessary (R2I padding list is in the parts list).
f. Remove the short form the input of the 34SSA. Apply a 10 V, 100 Hz sinewave at the input ter-
minals. Check for the following voltages.
1. With an oscilloscope, check for a sinewave at A15TP8. The amplitude of the sinewave
should be approximately 2.8 V peak to peak with no shift in the dc level (go to paragraph 8-C-4
if bad).
2. A halfwave rectified sinewave should be observed at TPS. The amplitude of the
waveshape should be approximately 1.4 V peak to peak, with no shift in the dc level (go to
paragraph 8-C-6 if bad).
3. The waveshape shown below with an approximate + .7S V dc level, should be observed at
TP4 (go to paragraph 8-C-8 if bad).
0 V
4. The waveshape shown below with an approximate -1 V dc level, should be observed at
TP3 (go to paragraph 3-C-8 if bad).
0 V
5. Check for approximately -f .S V dc at TP2 (go to paragraph 8-C-8 if bad).
6. Check for approximately +6.67 V dc at TPl (go to paragraph 8-C-8 if bad).
7. Check for approximately zero volts at TP7 with the 34SSA in the 10 V or 1000 V ranges.
This voltage level should change to approximately -IS V when the instrument is switched to the
1 V or 100 V ranges (troubleshoot gain switching circuit, if bad).
8-S9
Section Vlli
SERVICE GROUP C
Model 3455A
g. If all the above checks are good and the 34SSA displays approximately 10 V ac (with 10 V, KX)
Hz input), the RMS convertor should be ready for calibration. If the reading is incorrect, A10Q3 may
not be turned on or may be defective.
B-C-4. Preamplifisr and Input Attenuator Circuitry.
8-C-S. The waveshape at TPS appears to be incorrect, try the following checks (except where noted,
the input signal should be a 10 V, 100 Hz sinewave).
a. Check for the correct power supply voltages at U6 pins 4 and 7. Pin 4 should have approximate-
ly -IS V and pin 7 should have approximately + IS V.
b. Set the 34SSA on the 10 V range and short the input terminals. Make sure TPS can reach zero
volts, when adjusting R6S. If unable to reach zero, try changing R77 to 412 kO (part number: 0698-
4540). If R77 is a 412 K resistor already, replace U6.
c. If the signal at TPS is riding on a high dc level, make sure CR7 and Q20 are not touching any
shielding. Also make sure Q19 is not touching the heat sink of U6. Check CR7 and Q20 for shorts.
d. If the zero reading at TPS is good on the 10 V and 1000 V ranges and bad on the I V and 100 V
ranges, try the following checks.
1. Check the gain switching circuitry of Q16 to Q19, and US. Make sure TP7 reads approx-
imately zero volts on the 10 V and 1000 V ranges. On the 1 V and 100 V ranges TP7 should read
approximately -15 V.
2. If the gain switching is correct, lift the drain or source of Q19. Check for a zero reading at
TPS with the 3455A in the 1 V range. If the reading is good, replace Q19.
3. If the reading at TPS is still bad, short the drain to the source of Q18. If the reading is then
good, replace Q18.
4. If the reading at TPS is still bad, short TPS to the junction of R86 and R87. If the reading
is corrected, troubleshoot the feedback network.
e. If the 3455A has a history of bad QI9’s replace Kl, K3, and QI8. Q18 may be damaged if Q19
has been damaged. The timing of Kl and K3 could be incorrect, causing Q19 to be destroyed by a
I(XK) V input. Check ac calibrator output for any spikes and make sure the 10'’ V Hz limit has not
been violated.
f. If it becomes necessary to replace the matched set of resistors R76, R86, and R91, the new set
should be properly aged. Do the following procedure.
1. Set the 34SSA to the 10 V range and apply a 10 V, 100 Hz signal to the input. Note the
reading on the display.
2. Apply a 1000 V at 100 Hz signal to the input. Leave the 1000 V connected for about two
minutes.
3. Remove the 1000 V signal and reapply the 10 V at 100 Hz signal to the input. After a cool-
ing down period (less than 2 minutes), the reading on the display should have not changed more
than 25 counts from the reading in 1 above. Replace R76, R86, and R91 if necessary.
g. If it becomes necessary to replace the matched set of resistor R91 and R93, they also need to be
aged. Use the procedure in f above. The only exception to the procedure is to have the aging done on
the 100 V range rather than the 10 V range. A 100 V at 100 Hz signal should also be applied in place
of the 10 V signal.
h. Other circuits on the A15 board may cause preamplifier malfunctions. The preamplifier can be
isolated from the other circuits by lifting R52 and R64. If the preamplifier is working correctly, after
8-60
Model 3455A
SERVICE GROUP C
Section VIII
lifting RS2 and R64, the other circuits are causing the malfunction (absolute amp, squaring amp,
etc.).
8-C-6 Absoivta AmplHiar Circuitry.
8-C-7. If the waveshape at TPS appears to be incorrect, try the following checks (except where
noted, the input signal should be a 10 V, 100 Hz sinewave).
a. To check if other circuits on the A14 board causes failures in the absolute amplifier, the ab-
solute amplifier can be isolated. This can be accomplished by lifting RS2 and R53. The amplifier
should now be operating correctly. Troubleshoot the amplifier circuit, if defective.
b. Check the power supply voltages at pins 4 and 7 of U7. Pin 4 should be approximately -IS V
and pin 7 approximately + 15 V.
c. Check for an approximately 2.8 V peak to peak sinewave at U4 pin 6. Troubleshoot U6 and
associated circuitry, if necessary.
d. If the sinewave at U4 pin 6 has oscillations, reduce C22 to 10 pF (part number in parts list). Do
not reduce C22 below 10 pF, as the frequency response of the ac convertor may be affected.
e. The cathode/anode junction of CR5 and CR4 should have a sinewave with slight distortion at
the zero crossover point. Replace CR4 or CRS, if necessary.
f. If the signal at TPS is distorted, CR4 may have leakage. CR4 and CRS can be interchanged.
g. If QI4 or QIS appear defective, check with an ohmmeter and replace, if necessary.
8-C-8. Squaring Amplifiar, Integrator, and Antilog Circuitry.
8-C-9. The squaring amplifier, integrator, and antilog circuits are connected by feedback paths.
Isolation of these circuits may be difficult. There are, however, some checks used to help
troubleshoot these circuits (except where noted, the input signal should be a 10 V, 100 Hz sinewave).
a. In some cases it is possible to isolate the integrator from the other circuits on the A15 board.
This can be accomplished by shorting TP6 to the cathode of CR3. The reading at TPl should be ap-
proximately zero. If there are great offsets at TPl. troubleshoot the integrator.
b. Apply a 100 mV, 100 Hz sinewave to the input terminals of the 345SA. The instrument should
be in the 10 V range and display approximately .10(X) V. Check for dc readings of + .82 V at TP4, -9
V at TP3, -.48 V at TP2, and + .067 V at TPl. These readings may be helpful in isolating the squar-
ing amp, integrator, and antilog circuits.
c. Reapply a 10 V, 100 Hz sinewave to the input of the 34SSA. The instrument should be on the 10
V range. Check for dc readings of approximately + .66 V at TP4, -1.15 V at TP3, -.6 V at TP2, and
-I- 6.7 V at TPl. Again, these readings may be helpful in isolating the squaring amp, integrator, and
antilog circuits.
d. Check the power supply voltages of Ul, U2, and U3. Pins 7 of the op-amps should be approx-
imately -I- 15 V and pins 4 should be approximately - IS V.
e. Check for a voltage drop of approximately + 3.3 V across R36. If this voltage drop is incorrect,
Q12 or Q13 and their associated circuitry may be defective.
f. For parasitic oscillations at TP3 change R36 to 649 0 (part number: 0698-4460).
g. If the display of the 3455A indicates an overload condition with a good waveshape at TPS,
8-61
Section VIll
SERVICE GROUP C
Model 3455A
short Cl 3. The squaring amp circuit should now act like an emitter follower with a gain of one. Short
the input of the 345SA and if the display indicates zero, Q9A or Q1 lA may be defective. If the instru-
ment is still in overload, short the cathode of CR3 to TP6. If the overload condition disappears, the
square root amp (U2 and associated circuits) or QllB may be defective. If the overload condition re-
mains. troubleshoot the integrator (Ul and associated circuits).
h. If Q9 or QM are replaced, R6 may need padding. With a 1 V, 100 Hz sinewave applies to the in-
put of the 3455A, adjust RIS for a 1 V reading on the display. If RI7 is out of range, R6 needs pad-
ding. If the reading is low, increase the value of R6. If the reading is high, decrease the value of R6. A
change of 4 K ohms should change the reading about .5^t (padding list is in the parts list).
8 C-10. AC/DC Qparation.
8-C-l I . When dc coupling is used with an ac input signal, the specifications of the True RMS conver-
tor become wider. Make sure the instrument meets specifications before troubleshooting the ac con-
vertor in dc coupling. Some troubleshooting hints for the ac/dc operation are given below.
a. Large differences between an ac and dc input signal with the 34S5A set for ac/dc operation; -
Match the betas of Q9 and Qll. To further help the performance of the ac convertor in dc coupling,
add C40 (2.2 capacitor, part number: 0160-0128). A short procedure for the addition of C40 is as
follows.
1. Remove CR3 and install pins into the eyelet holes where CR3 has been removed.
2. Solder both CR3 and C40 to the pins. Make sure CR3 is mounted in the correct direction.
b. Difficulty in balancing ac and dc input signals with the 3453A set for ac/dc operation: Try
changing R5S.
c. Large differences with the 34SSA set for ac and ac/dc operation: change R95 to 806 ohms (part
number 0698-3557).
8-C-l 2. AC Noisa (Sehamatic 31.
8-C-13. Before checking for ac noise, verify that the dc readings are good. Troubleshooting for any
dc noise must be done before troubleshooting for any ac noise.
8-C-14. Most noise on the ac convertor board can be isolated into certain areas of the board. The
following procedure may be used to isolate those areas.
a. Apply a 10 V, 100 Hz sinewave to the input of the 34S5A. Set the instrument to the 10 V range
in the ac normal function.
b. With a DVM, measure the ac signal at TPS. It may also be possible to check the signal of TPS
with an oscilloscope, if the noise is great enough. If the signal is noisy, troubleshoot the input and
preamplifier circuits of the ac convertor.
NOTE
Someiimes it is possible to check noise at TPS with a D VM in the dc
mode. The input of the 3455 A has to be shorted with the D VM connected
to TPS. There should be very little deviation noted.
c. With the 10 V, 100 Hz sinewave applied to the input terminals, measure the voltage at TP5 with
a DVM in the ac mode. Again, it may be possible to measure the voltage with an oscilloscope. If the
signal is noisy, troubleshoot the absolute amplifier circuits.
NOTE
It is also possible to check for noise at TP5 with a DVM in the dc mode.
8-62
Model 3455A
SERVICE GROUP C
Section VIII
Again, ihe input of the 3455A should be shorted and very little deviation
should be noted.
d. Short the input of the 345SA and measure the dc voltage at TP3. If the voltage is very jumpy,
troubleshoot the squaring amplifier circuits.
e. Short the cathode of CR3 to TP6 and measure the voltage at TPl. This voltage may jump
around a little more than at the other test points. If the voltage is extremely jumpy, troubleshoot the
integrator circuit. If the voltage is relatively steady, the antilog or square root circuit may be noisy.
8-C-lS. The above procedure (paragraph 8-C-14) should isolate most areas on the ac convertor
board that may cause noise. A few other hints and checks, given below, may be helpful for specific
noise.
a. Noise on all ranges with the input shorted: Check for *2 mV to -3 mV at U2 pin 2. If the voltage
is out of the correct range, it may cause a noisy zero indication. The padding resistor (R21) may have
little or no effect in padding U2. This condition is usually caused by a leaky Q9B or CR2. Replace Q9
or CR2, if necessary.
b. Noisy when low frequency signal is applied to the 34S5A: The fast ac switching circuitry may
be defective. The following checks can be made to troubleshoot this circuit.
1. Apply a I V, 100 Hz signal to the input of the 34SSA, with the instrument set to the 1 V
range and to the normal ac function.
2. With an oscilloscope, check the signal at TPl. The signal should be approximately +6.7
V dc, with no ripple, if the signal has ripple on it and the dc level is incorrect, perform the next
step.
3. Set the 34SSA to the fast ac function. Measure the voltage at the junction of R4 and RS
and the gate levels of Q2 and Q8. The voltage should be approximately - IS V dc. Next, set the
3455A to the normal ac function. The gate levels of Q2 and Q8 should be approximately zero,
and the Junction of R4 and RS should be approximately + IS V dc. The gate levels of Q3 and
Q4 should be complimentary to the gate levels of Q2 and Q8.
c. Noisy in the fast ac mode: Check for a defective R9.
d. Other noise: If the 30 V regulator (A10U36) is defective, it may cause bursts of RF with heat.
This may show up as noise on all functions and ranges of the 34SSA. It would be, however, more
noticeable in the ac function.
8-C-16. Miscellaneous Troubleshooting (Schematic 3}.
a. 10 kHz reading high: Check for the correct high frequency padding of R89. In order to obtain
optimum accuracy over the entire frequency range of the 345SA, R89 should be padded approximate-
ly 4000 counts high with a 1 V, 1 MHz input. Use the following procedure.
1. The 34SSA should be turned on and warmed up for at least 1/2 hour. All shields and
covers should be in place.
2. Perform the RMS convertor adjustment in Section V of this manual.
3. Apply a 1 V, 1 MHz sinewave to the input of the 3455A. Pad R89 for a reading approx-
imately 4000 counts high. Check the accuracy of the ac convertor.
b. General hints: Give iheac convertor board a good mechanical inspection. Make sure ail relays,
op-amps, capacitors, and FETs are not touching the ground plane, shields, or each other.
c. Reading above 100 V erratic: Check for relay cases touching the ground plane.
d. Arcing at 1000 V ac: Check for capacitors touching the shield or ground plane.
8-63
Section Vlll
SERVICE GROUP C
Model 3455A
e. Unable to adjust 100 V at 40 kHz, within limits: Moving the wire connecting the R92, C29, and
C32, C34 modes away from the shield, may raise the reading.
f. The 100 V and 1000 V ranges inaccurate: The R92 and R93 resistor divider may have changed
value. K1 - K3 contacts may be resistive.
g. Overload indication with a 1000 V at 1 kHz to 10 kHz sinewave applied to the input: AlOKl,
K2, or KS may have developed leakage. The leakage can be isolated by removing the orange jumper
from the froni/rear switch connected to K1 and KS. If the overload condition disappears, KI or K5
may be defective. If the overload condition remains, remove the jumper from K2 and connect the
jumper directly to the input of the AIS board. If the overload condition disappears, K2 may be defec-
tive.
h. 1 V and 10 V ranges inaccurate and out of calibration; A1SK3 may be shorted.
i. Full scale readings go high with an increase in temperature: A1SQ9 or Ql 1 may be defective.
j. 1500 counts error on the higher ac ranges: Connect guard to low.
k. Differences in high frequency readings between the front and rear input terminals: Short the
rear terminals’ guard to low.
l. The ac convertor should be calibrated with the guard cover in place.
8 C-17. Average Responding AC Convertor (Schematic 2).
8-C-18. Due to the simplicity of the average responding ac convertors, only a few pertinent
troubleshooting hints are given.
a. Component location and layout may be critical to the convenor’s freqency response.
Capacitors, especially in the input circuit, should not be too close or too far from (he PC board.
Make sure (he relays are not touching the ground plane.
b. The ac convertor should be calibrated with the inguard cover in place.
c. A13Q15, U4, US, and associated circuitry may occasionally fail.
d. To help flatten the frequency response of the convenor, especially at 10 kHz, C2S is usually
padded with a 33 pF capacitor (pad list in the parts list). If unable to bring the level down at 10 kHz, a
28 pF capacitor may be used.
e. To help in troubleshooting the ac convertor, the following checks can be made.
1 . Apply a I V, 100 Hz sinewave to the input of the 345SA, with the instrument set to the 1 V
range.
2. US pin 6 should have a 1 V peak to peak sinewave and TPl should have a S V peak to peak
sinewave.
3. A 6.67 V dc voltage should be read at TP2. If this voltage is good and there is an incorrect
reading on the display, A10Q3 may not be turned on or may be defective.
8-64
Model 3455A
Section Vlll
SERVICE GROUP D
8 0-1. OHM TRQUBlESHQOTtNG (SCHEMATIC 1. 4).
6-0-2. Ohms Circuit Isolation.
8-D-3. Before troubleshooting the ohms convertor, the 3455A should be operating correctly in thedc
mode. Because some of the dc and Auto*Cal circuits are used in ohms, there circuits should be check-
ed before working on any ohms circuit. The procedure below may be helpful in isolating the ohms
section of the instrument.
a. With the instrument set to the dc function, check the zero and full scale reading on the display.
These checks should be made on all ranges (100 mV, I V, 10 V, 100 V, and 1000 V ranges). If any
malfunctions occur, go to Service Croup B for further troubleshooting.
b. Using the self-test mode of the instrument (see paragraph 8-B-3 for an explanation of the self-
test), check for any Auto-Cal constant failure. Co to Service Croup B if any constants fail.
c. If the dc readings on the instrument are good and the self-test passes, continue with this service
group for ohms troubleshooting.
8-D4. Ohms Servicing.
8-D-S. The following checks may be useful if the ohms function is completely inoperative.
a. Set the 3455A to the 2 wire ohms function, 1 K ohms range, and Auto-Cal off.
b. With no load applied to the terminals of the 3455A, check the voltage across the input ter-
minals. The voltage should be approximately -4.7 V dc (typically -4.5 V to 4.8 V). If the voltage is in-
correct, the ohms convertor board (A12) or the input relays may be defective. Co to paragraph 8-D-6
for further troubleshooting.
c. When approximately -4.7 V is observed at the input terminals, the ohms convertor is in voltage
limit. This is a correct indication with an open circuit input. Connect a 1 K ohm resistor across the in-
put terminals of the 34SSA. Measure the voltage drop across the resistor. The voltage should be ap-
proximately -.7 V dc and indicates correct constant current operation of the ohms convertor. Co to
paragraph 8-D-6 if the voltage is incorrect.
d. The above steps should isolate malfunctions in the current source circuitry of the ohms conver-
tor. If all the steps indicate correct ohms operations, the miscellaneous troubleshooting section of
this service group may be helpful (paragraph 8-D-8).
8-D-6. Ohms Convertor Troubleshooting (Schematic 1, 4).
8-D-7. Ohms convertor malfunctions may be caused by the ohms convertor board itself, or by the
AlO mother board. It is important to remember that the mother board and ohms convertor have in-
terconnecting ohms circuitry. Try the following procedure to troubleshoot ohms malfunctions.
a. With a dc voltmeter, measure the voltage across A12C1. The low side of the meter should be
connected to TP • V and the high side connected to the plus side of Cl . The meter should read -f 19 V
dc. If the reading is low by .5 V or more, A12TI or AlOTI may be at fault.
b. With an oscilloscope, measure the ripple across A12C1. The ripple should not be more than .1
V peak to peak. If the ripple is too high, check AlOTl, A12TI, C3, CR4, or Cl.
c. If the voltage across A12C! is very low or zero, look for an approximately 30 V peak to peak
square wave at the anodes of CR3 and CR4. This signal should be around 31 MHz with the 345SA set
8-65
Section VIII
SERVICE GROUP 0
Model 3455A
for 60 Hz line frequency. If (he signal is nonexistam, check for an approximately 3 V peak to peak
signal at AI0U33 pins 9 and 12. If there is a signal at these pins, troubleshoot the circuit between the
outputs of A10U33 and the secondary of A12T1.
d. If there is no signal at AIOU33 pins 9 and 12, make sure the divider U31 and U33 are operating
correctly. Also make sure U33 is enabled by line HI06. The inguard logic (Latch U12) may Im defec-
tive. if the HI06 line is low.
e. If all the above checks are good and the power supply voltages at A12TP - V and TP + V are
good, the other ohms circuits may be defective. Troubleshoot the ohms circuits on the AlO mother
board first. Make sure the correct relays and FETs are turned on. Troubleshoot the current amplifier
circuit and the voltage clamp amplifier circuit or the ohms convertor board.
8 0-8. Miieellaneout Ohms Troubleshooting Hints.
a. Table 8-D-l may be helpful in troubleshooting various ohms malfunctions. The table gives
various gain and reference resistor connections for ail the ohms ranges.
b. 1 K range to 10 K range inoperative; Check for the correct operation of A10Q13.
c. 100 K range to 10 M range inoperative: Check for (he correct operation A10QI4.
d. 2 wire ohms and 4 wire ohms not zeroing properly and the reading changes 100 counts when the
3455A is tapped; Check for a dirty front/rear switch.
e. 10 K and 10 M ranges read low: Check AKXJ27, Q22, or U3.
B-D-9. Ohffls Offsets.
8-D-lO. The following information may be helpful in isolating ohms offsets. Again, make sure the
3455A works correctly in dc.
a. If there is a 150 counts to 200 counts offset on the 1 K ohm range, check A10K9. This relay
should only be closed when the reference resistor is measured. If the 1 K ohm reading is low K9 may
always be open. If (he reading is high, K9 may be shorted.
Table 8-D-1. Ohms Gain and Switch Configuration.
Range
Ref
Ref
Unk Res
1
V
V Unk
Relays
Unk Res
In K Ohms
Res
Gain
Gain
(fs)
Ref
(fs)
Closed
forV L
0.1
1 K
X10
XI 00
.7 mA
0.7
0.07
K7, 8
(> K)
1
1 K
X10
X10
.7 mA
0.7
0.7
K7, 8
(> K)
10
1 K
X20
X2
.5 mA
0.5
5
K7, 8
(> K)
100
1 M
X2
X20
5 ^A
0.5
K8
0
(> 0)
1 K
1 M
X10
X10
.7 ,iA
0.7
0.7
{> Ml
10 K
1 M I
X20
X2
5/xA
0.5
5
(> Ml
f»: denotes full-scale
2 Wire Ohm:
K2. K4 Closed
VL: denotes Voltage Limited
4 Wire Ohm:
K3 Closed
b. A quick offset check: Short either AI0R59 or R61 and observe the reading of the 3455A. If the
offset disappears with RS9 shorted. A10Q13 and its associated circuitry may be leaky or defective. If
the offset disappears with R6I shorted. AI0Q14 and its associated circuitry may be leaky or defec-
tive.
c. If there is an offset on the 1(X) K ohm range, remove the blue wire connected to A10R59. If the
offset disappears, QI3 may be leaky.
8-66
Model 3455A
SERVICE GROUP D
Section VIII
6-D-11. Ohms Noise (Schemitic 1, 4).
8-D-I2. To prevent possible damage to sensitive components being measured, the ohms current
source of the 3455 A is limited to 5 V. Lower currents are used to keep this voltage low. Because of the
small currents, the ohms section of the instrument may be susceptible to noise.
8-D-13. Before troubleshooting for any ohms noise, make sure the dc noise level is good. Check for
noise on all dc ranges of the 3455A. If the dc operation is good, troubleshoot for ohms noise. A few
troubleshooting hints for servicing ohms noise are given below:
a. Excessive noise on all ranges: Check for a 19 V dc voltages across A12CI. If the voltage is low
by .5 V, A12TI or AlOTl may be at fault.
b. Readings decrease on each successive sample and then suddenly jump back, with the procedure
repeating. The case of AIOR63 may be touching the case of Q37.
c. Noise on the .1, 1, and 10 ranges: A10K9 may be defective.
d. Possible noise on the 100, I K, and 10 K ranges with very high readings at 1/iO scale: A12CR7
may be defective.
e. 1/10 scale reading on the 100 K range is noisy and low: Check for oscillation at AI0TP4. This
can be accomplished by setting the 3455A to the ohms function. The instrument should be on the 100
K range, with Auto-Cal off, and placed in Hold/Manual. TP4 should be monitored with an
oscilloscope. Press the HOLD/MANUAL button and observe for any oscillation at TP4. If any
oscillation is noted, try changing A10C4 to .0068 (part number 0160-0159) and AlORl 1 to 1.3 K
(part number 0757-0426).
f. Noisy at I M and/or 10 M ranges: Push all wiring away from the ohms board and all input
wiring away from the top guard cover, place the red wire, connected between the front/rear switch
and the AlO board, next to the guard sheet metal. All wires should be kept away from transformers
and transistors.
g. 10 M range very noisy: Make sure the 50/60 Hz switch is in the correct position.
h. Noise on the 1 K range: If noise shows up on older instruments, make sure on 18 guage teflon
coated wire is installed in the instrument. The wire should be connected between pin E of A10J3 and
the cardinal ground terminal located between K7 and K9. The wire may reduce noise on the 1 K ohms
range as well as the I V ac and dc ranges.
i. Noise in ohms function: To reduce external noise in ohms function, shielded cables are very
useful. When measuring resistance in the 2 wire and 4 wire ohms function, connect the resistor to the
3455A with one or more shielded cables. The shields should be connected to each low terminal. Most
noise, associated with external body capacitance, should be shunted to ground rather than through
the measuring instrumentation. The cables should not be reversed (the shields connected to the high
terminals and the center conductor connected to the low terminals), or no shielded cables should be
used. No shielded cables or reversed cables may cause excessive noise in ohms.
8-67
Section VIII
Model 34S5A
SERVICE GROUP E
8 E-1. AID CONVERTOR AND INGUARD LOGIC TROUBLESHOOTING.
8 E-2. AID Convertor Servicing ISchemetic 6, 7).
8-E-3. Before troubleshooting the A/D circuits make sure the outguard section of the 3455A is
operating correctly. Use the half-splitting method of paragraph 8-1 9S. The following procedures may
be used to check the correct operation of the A/D circuits.
a. Turn the 3455A off. and disconnect the AlOWI Inguard/Outguard Cable assembly from the
outguard connector (A1J7).
b. Remove the analog test jumper (from A10U27 pin 10), and connect test point A10TP9 to
ground.
c. Apply -10 V dc to the input terminals of the 34SSA and turn the instrument on.
d. With an oscilloscope measure the waveform at AlOTPl. The waveform should look like
top waveform in Figure 8-E-l.
e. The correct waveform at TPl generally indicates correct A/D operation. If, however, the A/D
waveform is good and the A/D circuit is still inoperative, go to paragraph 8-E-7 for troubleshooting.
Figure 8 E-1. A/0 Waveforms.
8-68
Model 3455A
SERVICE GROUP E
Section Vlll
f. For no A/D waveform at TPl, go to paragraph 8-E-4 for troubleshooting. For an incorrect
waveform go to paragraph 8-E-6.
8 E4. No A/D Wavoform.
8-E-S. Since the A/D waveform is dependent on various circuits in the 3455 A (input, main amplifier,
etc.), isolation of these circuits is necessary. The method used is simply a signal tracing method with
limited operational checks.
a. Set up the 3455A using the procedure of paragraph 8-E'3a, b, and c.
b. Measure the voltage at the multiplex node (sources of AlOQI, Q2, Q3, and Q4). If the voltage is
not -10 V dc, the input circuit may be inoperative. The multiplex node may also be loaded down by
one or more FETs.
c. Measure for a >10 V dc voltage at A10TP4. If the voltage is incorrect, troubleshoot the main
amplifier circuit. Make sure A10Q19 is turned on.
d. Measure the instrument's reference voltages. A10TP8 should be -f 10 V ± 100 and TP7
should be • 10 V ± 20 mV. If the reference voltages are incorrect, troubleshoot the reference assembly
(A 1 1 or A20) and/or U7. The reference voltages are used on the A/D board and should be correct for
proper A/D operation.
e. Short across capacitor A14C2 and measure the voltage at A14TP1. The voltage should be ap-
proximately zero. If there are any great offsets, troubleshoot A14U3 and associated circuits. If the
voltage at TPl is good, remove the short from C2 and continue with this procedure.
f. Short AI4TP1 to ground and measure the 0 detect, 10 V detect, and .2 V detect levels. The table
below gives the correct detect levels. Remove the short from TPl and apply -10 V to TPl. Measure
the levels of the 0 detect, 10 V detect, and .2 V detect. See the table below for the correct levels.
A14TP1 Shorted
A14TP1 at -10 V
0 Detect Level
s 5 V
s 0 V
1 0 V Detect Level
s 0 V
s 5 V
.2 V Detect Level
s 0 V
s 0 V
If the levels in the table are incorrect, troubleshoot A14U4, 5, 6 and their associated circuits.
g. Other circuits on the A/D board may affect A/D operation. These circuits are the input circuits
and diode array U\ and #2 and their associated circuits. Also make sure A14Q3, Q4, and their
associated circuits are operating correctly. If these circuits appear to be working correctly, the in-
guard logic may be at fault. Go to paragraph 8-E-lO for further troubleshooting.
8-E-6. Incorrect A/D Waveform.
a. Check for a leaky AI4C2, Q5, U3, or U5 and associated circuits. Circuits past U4 may
also be defective.
b. Circuitry preceeding the integrator may also cause an incorrect A/D waveform. Make sure
A14Q2, Q4, and their associated circuits are operating correctly.
c. Check for correct operation of the detect circuitry. Paragraph 8-E-5f may be helpful in
troubleshooting these circuits.
B E-7. Correct A/D Waveform.
a. If the A/D waveform is correct and the A/D board is still inoperative, check the zero detect cir-
cuit. Make sure the zero detect signal is stable with the correct voltage levels (approximately 0 V or 5
V).
8-69
Section VIII
SERVICE GROUP E
Model 3455A
b. If the 0 detect signal of older instruments is unstable, modify the instrument in the following
way:
1. Change A I4R44 from a 10 M ohm resistor toa 2 M ohm resistor (part number 0683-20S5).
2. Change A12R7, R8. R16, and R17 from 4.99 K to 10 K ohm (part number 0757-0442).
c. Check for the correct operation of AI4US and its associated circuitry. Since U5-and its
associated circuitry is an absolute amplitifer, the output of the amplifier (emitter of U6) should be the
same as the signal at TPl. Therefore, pins 14 and 15 of the A 14 board should also show the absolute
value of the signal at TPl. The correct signals for a -10 V input to the 3455A are shown in Figure
8-E-l. If the signals at A14P1 pins 14, IS, and S are incorrect, troubleshoot the detect circuits.
d. Make sure any oxidation layers have not formed on the pins of the AI4 board. The pins can be
cleaned with a soft lead eraser.
B-E-8. AID Noise (Schematic 6).
8-E-9. A/D noise will usually show up in all ranges and ail functions of the 34S5A. Two circuits to
check for noise on the A/D board are the integrator and the input circuits.
a. Check for a noisy A14Q5 or U3. Make sure there are not oscillations present at TPl.
b. Check for a stable zero detect signal at A14U6 pin 1. If the signal is unstable, U4 or U6 may be
noisy.
c. Check for a noisy AI4Q3.
B-E-10. Inguard Logic Troubleshooting (Schematic 7).
8-E-l 1. Before troubleshooting the inguard logic make sure the outguard logic is operating correctly.
Use the half-splitting technique of paragraph 8-195.
a. Check the back gate bias voltage (B.G.) of the processor (A10U26 pin 387). The voltage should
be within ± .25 V of the voltage marked on the processor. If the voltage is incorrect, check for the
correct value of pad resistor A10R105 (pad list in parts list). If the pad resistor is the correct value and
the bias voltage is incorrect, replace the processor.
8-E-12. Inguard Logic Troubleshooting with no AfO Waveform.
a. The signals at A10U26 pins 34 to 37 should be the same as those on A3TP4 to TPl. The only ex-
ception is the signal at A10U28 pin 9. If the signals do not agree, check for malfunctions in the in-
guard light isolators. A10U34 and U35, plus their associated circuits. Line F0 and FI transfer data
from outguard to inguard (F0 is the data transfer line and FI is the data transfer rate line).
b. If pin 9 of AIOU28 is different than pin 37 of U26 and the HAZ line (pin 1 of U27) is low, the
pulse transformer and/or associated circuits may be defective. This interrupt circuit can be checked
by manually clocking A IOTP 10. and can be achieved by pulling TP 10 low and then releasing it. If no
toggling is taking place, troubleshoot the interrupt circuit consisting of A10U32A and U27. If there is
toggling, check T2 or the outguard section (Al).
c. The interrupt request lines at pin 29 of A10U26 must be high. Troubleshoot the interrupt cir-
cuitry if necessary.
d. Data lines D0 to D7 (pin 18 to 35 of U26) and program address lines (PA0 to PA7 pins 1 to 8 of
U26) should have voltage levels from approximately zero to approximately + 4.5 V. Check for any
circuits causing these lines to be loaded down. It is possible and normal to observe sharp peaks of 3 V
to 3.5 V on some lines of U26. These peaks are present when the line is in a tri-state mode. This is a
possible and normal operation.
8-70
Model 3455A
SERVICE GROUP E
Section VIII
Table 8-E-1. Mnemonic Definitions.
P N
Poliarity
Indicator — J L
(H = High True
L = Low True)
Function
Indicator
Specific Line
Indicator
Mneumonic
HAC
HAC1
HAC2
HADl
HAD2
HAD3
High
High
High
High
High
High
HAZ
HI01
HI02
HIP3
HI04
HI05
HI06
High
High
High
High
High
High
High
Definilions
True AC (AC Enable)
True Auto Cal 1(100 V, 1 kV Auto-Cal Constant (Cal Constant 4. 5, 6, 711
True Auto Cal 2
True Analog DC 1 (.1 V, 1 V, 10 V Range and Ohms)
True Analog DC 2 (100 V, 1 kV Range)
True Analog DC 3 (1 k V Range)
True A/D Zero (Enables or Resets A/D)
True Input Ohms 1 (2 Wire Ohms Enable)
True input Ohms 2 (Connects 4 Wire and Current Source)
True Input Ohms 3 (Ohms Ref Low Measurement)
True Input Ohms 4 (1 K Reference Resistor Select [with HI05])
True Input Ohms 5 (.7 WA Current Source Select)
True Input Ohms 6 (Ohms Current Source Enable)
HMA1
HMC1
HMC2
HMC3
HMC4
HMD1
HMD2
High Measure AC 1 (Output from AC Converter Measured)
High True Measure Constant 1 (Measures Ohms, .1 V and 1 V Offsets [Cal
Constant 2, 3, 8, 9, 1 1 j)
High True Measure Constant 2 (Measures 10 V Gain [Cal Constant 10))
High True Measure Constant 3 (1 kV Range Enable [Cal Constant 0, 1, 6)1
High True Measure Constant 4 (Measures 1 V Gain [Cal Constant 0})
High True Measure DC 1 (100 V Rangel
High True Measure DC 2 (.1 V 1 V, 10 V Range and Measure & Unk)
HM01
HM02
HPD1
HPD2
HPD3
HP01
HPRF
HPRS
HR12
HR24
HR34
LACF
LAC3
LAC 5
LNRF
LNRS
LVIN
High True Measure Ohms 1 (Measure Ohms Ref, Range 100 K. 1 M, 10 M)
High True Measure Ohms 2 (Measure Ohms Ref, Range .1 K, 1 K 10 K|
High True Pre-Amp DC 1 (x 20 and x 100 Gain)
High True Pre-Amp DC 2 (x 1 Gain)
High True Pre-Amp DC 3 (x 10 Gain)
High True Pre-Amp Output (x 2 and x 20 Gain)
High True Positive Rundown Fast (For Negative Input Voltage)
High True Positive Rundown Slow (For Negative Input Voltage)
High True Range 1 2 (Sets AC Converter Range 1,10)
High True Range 24 (Sets AC Contertor Range 10, 100)
High True Range 34 (Sets AC Converter Range 100, 1000)
Low True AC Fast (AC Fast Enable)
Low True Auto Cal 3 (100 V, 1 kV Auto-Cal Constants [Cal Constant 4, 5, 6,
71)
Low True Auto-Cal (1 kV Range and 1 k^, 1 V Offset [Cal Constant 1 . 6|)
Low True Negative Rundown Fast (For A/D Positive Input Voltage)
Low True Negative Rundown Slow (For A/0 Positive Input Voltage)
Low True Voltage Input (Enables A/D Input)
e. The clear line of A10U15 pin I should have an approximately + 5 V level. Troubleshoot U9.
UI9, and their associated circuits.
8-71
Section VIII
SEBVICE GROUP E
Model 34S5A
f. Check for a dock signal at A10UI5 pin 9. If the signal appears to be good, the processor (U26)
and/or the ROM (U2S) may be defective. If the clock signal is missing, check for 500 nano second
pulses at the device select lines of U26 (pins 12 to 15). If the pulses are good, U14 may be at fault.
8-E-13. Inguard logic Troublashooting with an A/D Wavaform.
a. Check the light isolators and associated circuits as explained in paragraph 8-E-12a.
b. Check for a defective A10U26.
c. Check for an open A10CR41 and CR42. These diodes may cause glitches on U26pin 29, causing
the processor to be interrupted continuously.
8-72
Model 3455A
Section VIII
SERVICE GROUP F
8 F-1. OUTGUARD LOGIC TROUBLESKOOTING (SCHEMATIC 8. 9. 10).
8-F-2. Outguard logic troubleshooting should be done using the Signature Analysis Routines (SA) in
Figures 8-H-20 to 8-H-27. If any incorrect signatures are observed, the following checks may be
helpful.
a. If any incorrect signatures are observed check for a I ^F capacitor across AIU49. Install one if
missing (part number 0180-0291). The capacitor should be installed to the underside of the A1
motherboard, with the + terminal to pin 14 of U49 and the • terminal to pin 7 of U49.
b. If no stable signature can be located and the A3 board has been replaced, check the IC signals.
Make sure they are toggling with good logic highs and lows (approximately 4 V peak to peak).
c. Check for the waveform shown below at the junction of A1C29 and R42. If this signal is miss-
ing, C29 may be defective. U48 may also cause the missing signal.
2 V
I V
(4—3 1.4 msec-
O V.
8 F-3. Main Controller Troubleshooting (Schematic 8).
a. Data lines D0 to D7 (pins 1 8 to 25 of U3U9) and program address lines P A0 to PA9 (pins 1 to 8
of U9) should have voltage levels approximately + 4.5 V peak to peak. Check for any circuits that
may cause loading.
b. Sharp peaks of 3 V to 3.5 V may be observed on some lines of the processor (A3U9). This is
normal. The peaks are present when the processor is in a tri state mode.
c. Check the back gate bias voltage (G.B.) of the outguard processor (A3U9). If the voltage is dif-
ferent from the voltage marked on the processor (by ± .35 V) check for the correct value of the pad-
ding resistor A3R3. If R3 is the correct value and the bias is incorrect, replace the A3 board. The cor-
rect value of R3 is listed in the following table.
G.B.
A3R3
•hp- Part No.
•5.0 V
4.64 kO
0698-3155
-4.5 V
2.87 kn
0698-4436
-4.0 V
1.96 kR
0698-0083
-3.5 V
1 .00 kO
0757-0280
•2.5 V
715 n
0698-3700
8 F-4. Front Ponol Troubleshoot
ng.
8-F-5. Front Panel Oporotion Check.
a. Turn the 3455A off. Place the instrument in the SA mode by disconnecting the test jumper on
the A3 board and disconnect the plug from A1J7.
b. Turn the 3455A on. Half of the instruments from panel LEDs should alternately turn on and
off with the other half.
c. At the time the instrument is turned on and half the front panel LEDs turn on, a 0 should be in-
dicated on the left side of the display. The 0 should move one position to the right each time the LEDs
change. When the 0 reaches the far right of the display, a .0 will start at the left and move to the right.
8-73
Section VIII
SERVICE GROUP F
Model 3455A
d. The same operation takes place for 1, .1. 2. .2, 3, .3. after the .0 has moved to the far right of
the display. If any of the LEE>s do not light, replace them or troubleshoot their drive circuits. If some
numbers of the display are bad, troubleshoot the display and associated drive circuits.
8-F-B. Front Panol Servieino (Schomotic 10).
a. If the display blanks out any zeroes, try replacing AIU62.
b. The proper operation of the front panel buttons can be checked by monitoring A1U5^ pin 14.
The level at pin 14 should go low (TTL) low, any time a front panel button is pressed. If this is not
observed, try replacing U57.
c. If the front panel buttons do not operate, check for a high level (TTL high) at A1 J8 pins 2 and
3. A high level at any of these pins will disable some of the front panel buttons. Check for the correct
operation of AlUSl, U50, or US3.
d. If the front panel has a sticky switch, try the following: With a low temperature soldering iron,
heat the solder connection of the LED within the switch. While the solder is warm, push the button in
and out several times. This should straighten out the LED and relieve any pressure on the switch.
e. If the procedure in the precendent paragraph does not relieve sticky switches, change LEDs
A2CR5 to CRl 1, CR19 to CR22, and CR24 to CR35 from -hp- part numlKt 099(W)547 to -hp- part
number 1990-0665. These changes should be made for instruments with serial number I622A0I336
and below. A procedure for changing or replacing LED’s are in paragraph 8-F-7.
f. A modification to reduce key bounce is as follows: Change A1U57 from a 9318 to 98L18 (part
number: 1820-0987), A2R17 and R18 from a 2.2 K ohm resistor pak to a 10 K ohm resistor pak (part
number; 1810-0206). This change should be made for instruments with serial number 1622A00906
and below.
NOTE
Switch bounce can be observed by pressing the ENTER Z button and
then pressing the MA TH OFF button only once. If two 2 'j are displayed,
the 2455A has key bounce.
g. For all other front panel malfunctions use Troubleshooting Diagram 8-H-26.
B-F-7. Front Panel LEO'a Switch, and Kay Cap Replacement Procedure,
a. Removal Procedure.
1. Remove front frame which is held by 8 screws.
2. Disconnect two connectors between front panel and left side of instrument.
3. Remove front panel and ON/OFF switch.
4. Remove II screws holding Display/Swiich board to front panel and remove Display/-
Switch (D/S) board.
5. Pull key cap off switch body.
6. With knife or punch, cut off or punch through the red switch body mounting studs (clean
excess plastic off to prepare holes for new switch).
7. Hold display board upside down with key facing down and heat LED terminals to let bad
LED fall out.
8. Suck out solder holes to prepare for new LED.
8-74
Model 3455A
SERVICE GROUP F
Section VIII
b. Replacement Procedure.
1 . Mount the switch body on the D/S board and be sure the body is aligned with the other
switches (NOTE: very important as the switch may bind if it is not straight).
2. Using a medium temperature, broad, tip soldering iron or woodburning tool, carefully
melt the plastic studs down into a little dome to secure the switch body.
3. Insert LED with shorter leg toward top of board. Make sure LED is flush with the board.
4. Replace key cap.
5. Depress key all the way to seat LED in place, and then solder LED using a minimum of
solder.
6. Hold D/S board so keys point up and reheat LED terminals to allow solder to flow away
from switch.
7. Depress key several times to make sure key does not stick, if it sticks, repeat (6).
8. Remount D/S board on front panel frame.
9. Plug both connectors back into main board.
10. Remount front panel to chassis.
1 1 . Replace ON/OFF switch.
NOTE
Remember to try steps (6) and (7) of "’Replace" before replacing switch;
it could save time. It is important to use a low or medium temperature tip
soldering iron, as exposure to SOO^F for over S seconds could damage the
LED’s.
8-F-B. HP-IB Troubleshooting (Schematic 9).
8-D-9. Before troubleshooting the HP-IB section of the 3455A, verify that the 3455A is malfunction-
ing and make sure the “problem” is not due to externa] programming (see Section III of this
manual).
a. If incorrect data is sent over the HP-IB lines, make sure the data is different than what is
displayed on the front panel. If the data is the same, the instrument’s HP-IB Section is not at fault.
b. Check for a bad connection between the instrument's HP-IB connector (J3) and the connector
of the HP-IB cable. Clean both connectors, if necessary. Use a good freon based contact cleaner.
Also, make sure the HP-IB cable external to the instrument is good.
c. Use the HP-IB SA Troubleshooting Diagram (Figure 8-H-27) for most of the HP-IB Section of
the 34SSA. SA can check most of this section, except for the HP-IB lines themselves. Use the S9401A
Bus System Analyzer for these lines.
d. Check decoders AIU19, U20, or UIl.
8-75
Section VIII
Model 3455A
SERVICE GROUP G
8-61. MISCELLANEOUS TROUBLESHOOTING.
8-G-2. Powar Supplin ISchsmatic It).
a. In many of the 345SA's power supplies, the voltage reference of one supply is the output of
another. This arrangement ties the voltages of the two supplies together. A shift in one supply is
reflected in the other supply.
b. To isolate dependent supply circuits, the reference supplies should be separate from each other
and from the circuits they supply. The following steps may be used.
1 . Use external supplies to provide a reference to dependent supplies.
2. Use external supplies to drive circuits in place of internal supplies.
c. Following are some voltages of the inguard power supplies.
1. Main power supply voltages.
AlOTPll: +9 V to +11 V
A10TPI2: + 19.5 V to +23.5 V
A10TP13: -19.5 V to -23.5 V
A10TP14: +38 V to +44 V
A10TP15: -38 V to -44 V
AIOTP + 9: + 8.1 V to + 9.9 V (Inguard processor must be installed).
2. Ohms supply voltages
AlOTl pins 1 and 3: 10 V rms (20 V peak to peak) square wave.
AlOTl and AI2T1 connection: .2 V rms (.25 V open circuit) square wave.
A12T1 pins 1 and 3: 40 V rms (80 V peak to peak) square wave.
3. Allowable noise on the ohms supply as measured with a true rms voltmeter.
+ 6.2 V supply: 30 <iV noise
-6.2 V supply: 60 /iV noise
d. If the fuse of the 3455A keeps opening, check the AlO board power supply breakdown diodes
(A10CR64, 66, etc.). Also, make sure the 3455A has been switched to the correct line voltage.
e. Table 8-C-l lists the various components and assemblies which uses the individual power sup-
plies. This table may be useful if a power supply is loaded down by a defective component or
assembly.
Table B G-1. Power Supplies Locetions.
1 lu ( M nr
1 1 « S » T 1 9 M 11 1) 14 la la If :a 86 n 21 II M hi »
A D «e< AC
2 5 a t «a
• iOi,
X X .
,
• 2R 3V
V
• 18 V
a
A *
a
■iv
*
x*A«#»*
1
■ a
“T
IS V
1
t X t
•
8 G-3. Reference Assembly (Schematic 5).
a. The reference assembly of the 3455A is on the exchange program and should be returned to the
8-76
Model 3455A
SERVICE GROUP G
Section VIII
nearest -hp- Service Office, if inoperative. The only checks that can be made are the following.
1. If the reading on the display jumps 10 or 100 counts when adjusting any adjustments on
the reference assembly, the wiper of the pot may be dirty. Work the adjustment screw of pot
back and forth to clean the wiper.
2. Make sure an oxidation layer has not formed on any pins of the assembly printed circuit
board. The pins can be cleaned with a soft lead eraser.
3. Typically, the maximum noise allowed on the reference voltages (use a DVM with input Z
> 1010) are 20#tV for the + 10 V reference and 30 /tV for the -10 V reference. Replace
the assembly if excessive noise is present.
4. The + 10 V reference voltage at A10TP8 should be adjustable to -f 10 V ±
100 fiV and the -10 V to -10 V +20 mV. Replace the assembly if both the + 10 V and
-10 V are not adjustable. Replace A10U7 if only the -10 V reference is incorrect.
8-G-4. Turn-Over Errors (Schematic 1, S, and B).
8-G-S. Turn-over errors are present when, for example, a positive input reading is good and the
negative input reading is out of tolerance. This can be checked by taking a positive reading and then
reversing the input leads. The following are a few turn-over checks and hints.
a. When checking for turn-over errors, the 10 V range and zero offsets should be the first things to
check.
b. Check the A/D converter (A14) if turn-over differences arc observed. Replace, if necessary.
c. Turn-over errors on all ranges: Unsolder CRl and CR2 from the AlO board. If
the error disappears, CRl and/or CR2 may be leaky. Make sure the + 10 V and -10 V
references are good (A10TP8 should be + 10 V ± 100 /»V and A10TP7 should be -10 V
± 20 mV).
d. Turn-over differences on the 10 V range: Check AlOUl, U2, Q7, or QI8. Other
possible causes may be Kl, Al, Q2, Q4, Q19, and their associated circuits.
e. Turn-over errors on the top three ranges: Check A10K6 and QIS.
f. Turn-over differences on the l(X) V and KXX) V ranges: Lift A10Q9 and CR29. If the error
disappears, CR31 and/or CR29 may be leaky. Do the same with CR16 and CR17. Q8 may also be
defective.
g. The FETs connected to A10TP2 may cause turn-over errors, if leaky. (^40 may also be leaky.
h. If the negative readings are good and all positive readings above 20 V are unstable on the 100 V
range, check AI0Q36.
B-G-6. Othar Troubleshooting (Schematic B and 111.
a. If the instrument fails to sample in the dc volt, high resolution mode and the ac volt normal
resolution mode, check A1C29 or U48.
b. If the HP-IB operation is intermittent with the instrument’s LED’s dim, make sure the 50/60
Hz switch is in the correct position.
c. If the fan refuses to spin after repeated turn-ons, change AIRIS, 19, and 24 from 11.8 kll to
13.3 kll (0757-0289). This change should not be made on operating fan circuits.
d. A good fan measures approximately 30 (1 between the brown and yellow wires of the fan. A
defective fan will usually measure between 10 (1 and IS Q.
8-77
Section VIII
Model 34S5A
SERVICE GROUP H
B H-1. TROUBLESHOOTING DIAGRAMS.
8-H-2. The following diagrams in this service group may be used to troubleshoot the 34SSA in place
of the other service groups. These diagrams are separated into three groups. The first group is a
General Troubleshooting Diagram which can be used to isolate the two main sections of (he instru-
ment (Inguard and Ouiguard). The second group deals with the Inguard section and the third group
can be used for Outguard Troubleshooting.
8-H-3. General Troubleshooting Diagram.
8-H-4. The General Troubleshooting Diagram (Figure 8-H-2) may be used in place of the Half-
Splitting Technique of paragraph 8-196. Since this method is not as complete as the Half-Splitting
Technique, use it only if an extra 34SSA or if an Inguard/Outguard Service Cable is not available.
8-78
Figure 8-H-1. Assembly and Test Point Locations.
Turn Instrument ON. Press
The Front Panel TEST
Button.
Proper Operation Of The TEST
Function Is Indicated Bv The
Front Panel Going Blank For A
Few Secotvfs And Then All From
Panel Enunciators (Except REAi^
TERMINAL) Being Lit And A
Display of + 8888888 With A'l
Decimals Lit Or If A Failure Is
Detected By The TEST Routine.
A Number. From 0 To 1 3 Will Be
Displayed.
YES
The Proper Operation Of The
TEST Function Indicates That
The Majority Of The Inguard And
Outguard Logic Is Functioning
Properly. The TEST Function
Does Not Check The Following
Circuits: AC Converter, Ohms
Converter, Front Panel Switching,
HP-IB Interface, And Some Of
The Input Switching Circuits On
The AID Assembly. Refer To The
HP-IB Section Of The Outguard
Troubleshooting Procedure For
HP-iB Problems. Refer To The
Schematics And Theory of Opera-
tion For Troubleshooting The
Other Circuitry.
YES
A Failure Code Indicates That One Or
More Of The Auto-Cal Constants Is Out
Of Test Limits.
Record Number Displayed
1
Turn The Instrument OFF.
Disconnect The Test
Jumper On the A3 Assem-
bly And The Connector
From A1J7. Turn The
Instrument ON,
Proper Operation Of The Out-
guard Test Routine Is Indicated
By A Number or Character Being
Strobed Across The Display And
The Enurtciators Being Alter-
nately Lit,
Go To Outguard Trouble-
ahootlng Section Or Ap-
propriate Service Group
(See Paragraph 6-198).
The Numbers Recorded Indicate
Which Tests Have Failed. Use The
Front Panel TEST Troubleshoot-
ing Information Portion Of The
Inguard Troubleshooting Section,
Along With The Schematics To
Troubleshoot The Inguard
Switching.
Go To Inguard/Outguard
Transfer Circuitry Trouble-
shooting Procedure Figure
8-H-17 Or Appropriate
Service Group (See Para-
graph 8-1 98).
3455-B-ll
Figure 8-H-2. General Troubleshooting Procedure Diagram.
8-79
DISCONNECT PLUG
FROM J7 FOB TEST,
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Model 34SSA
SERVICE GROUP H
Section VIII
8-H-4. Inguard Trsublathooting Diagram.
8-H-5. The following diagrams in this group can be used to troubleshoot the Inguard section of the
3455A. A troubleshooting procedure for the Inguard/Outguard Transfer Cifcuitry is also included.
8-81/8-82
■^The Signal^
Levels > 4 V
Peak-To-Peak
' . ? /
Replace Or Troubletfiool
The A/0 Converter 1A14
Assecnblyl. The Problem It
Mott Likely In The Sv>litch-
ing Circuits (A14U1. U2,
Q3. 04 Artd Associated
Co mponents.
The Device
Select Signal
At A10UI5
Pin 9 >4 V
Peek-To-Peek?.
Troubleshoot The Iriguard
Logic Circuit (AtOU15.
U22. U26 And Associated
Components.)
Troubleshoot The Device
Select Circuit IA10U14.
(J26 Artd Associated Com-
ponents).
3455 - 0-1
rt 8-H-3. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 13.
8-83/8*84
3455-6-2
Figure 8-H-4. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 12.
8-85/8-86
Troubleshoot The Device
Select Circuit (A10U12.
U14. U26 And Associated
Components).
Troubleshoot The Device
Select Circuit IA10U16,
U14, U26 And Assocleted
Components).
Figure 8-H-5. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 1 1 .
3455-8-3
8-87/8-88
Auto-Ca] Circuitry TEST 10.
8-89/8-90
3455-0-5
Figure 8-H-7. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 9.
8-91/8-92
Figure 8-H-8. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 8.
8 - 93 / 8-94
( Start )
I
With A
Display
Reading
0( "V
(Test 7
Failure),
, Measure The Switch Drive
Voltage
A10U4.
On Pin
14 Of
Troubleshoot The Device
Troubleshoot The Device
Select Circuit IA10U13,
Select Circuit (A10UI2,
U14, U26 And Associ-
U14, U26 And Associ-
ated Components).
ated Components).
Troulilcshool The Logic
The Device Select^.
Troubleshoot The Logic
Circuit (A10U13, U22,
I Sicnal At Pin 9 Of I'Ab ^
Circuit (A10U12, U22,
U26 And Associated Com-
1 A10U12>4V 1
U26 And Associated Com-
ponents).
^\Peak -To -Peak^^
ponents).
Troubleshoot The Device
Troubleshoot The Device
Select Circuit (A10U13.
Select Circuit (A10U16,
U14, U26 And Associated
U14, U26 And Associ-
ated Components).
3455 -D-5
Figure 8-H-9. Inguard Troubleshooting Procedure Diagram,
Auto-CaJ Circuitry TEST 7.
8-95/8-96
Start
With A Diaplav Reading Of
'’6" (Test 6 Failure), Mea-
sure The Switch Drive
Voltage On Pin 14 Of
A10U4.
is
N.
Is 'N.
^ The Switch Dri'
kJ A • Oir> 1 r
e^
4
>YES
The Switch Drive ^N^YES f”
L A10U24 Appro
iX .
J
^ AlOUSApprcx. ^ ^
Check A10U4 And Associ-
ated Components.
Troubleshoot The
Logic
Circuit (A10U13,
U22,
U26 And Associated Com*
ponentsl.
Check A10U6 And Associ-
ated Components.
Troubleshoot The Device !
Select Circuit {A10UI3, '
U14, U26 And Assooi- '
ated Components). |
1 ▼
Troubleshoot The Device
Select Circuit (A10U12,
U14, U26 And Associ-
ated Components).
Troubleshoot The Logic
Device Select^s,,^
Troubleshoot The Logic
^un'The 0 Sl!lec^S,.
Troubleshoot The Logic
Circuit (A10U16, U22,
1 Signal At Pin 9 Of
Circuit (A10U16, U22,
^^Sional n 9 Of |YES
Circuit (A10U16, U22,
U26 And Associated Com-
L A10U16 >4 V J
U26 And Associated Com-
L AlOl -4V J *
U26 And Associaiied Com-
ponenis).
-To •Peak^^^.x'''*^
poncnts),
\s^eal ’eok/'^
ponents).
NO
Troubleshoot The Device
Select Circuit (A10U16,
U14, U26 And Associated
Components).
Troubleshoot The Device
Select Circuit IA10U16,
U14, U26 And Associated
Components).
Troubleshoot The Device
Select Circuit (A10U16,
U14, U26 And Associ-
ated Components).
3455-D-7
Figure 8-H-lO. Inguard Troubleshooting Procedure Diagram,
Aulo-Cal Circuitry TEST 6.
8 - 97 / 8-98
Auto-Cal Circuitry TEST 5.
8-99/8-100
With A Display Reading Of
•4'' (Test 4 Failure), Mea-
sure The Switch Drive
Voltage On Pin 14 Of
A10U4.
Check A10U9 And Assoc-
iated Components.
Check A10U5 And Associ-
ated Components.
Troubleshoot The Gate
Troubleshoot The Gate
Bias Amplitier Circuit
Bias Ampliliei Cucuit
(A10U1. OB And Associ-
(A10U1, QB And Associ-
ated Components).
ated Components).
1
'
V
Troubleshoot The Logic
^XThe Device Seleci\,^
Troubleshoot The Logic
Circuit (A10U13. U22.
^^Signa^t Pi n 9 Of ^ES ^
Circuit (A10U16. U22,
U2€ And Associated Com-
1 A10U16>4V •
U26 And Associated Com-
poncnts).
^sPeak-To-Peak/'''^
ponents).
3455-D-a
Troubleshoot The Device
Select Circuit <A10U13.
U14. U2€ And Associ-
ated Components).
NO
Troubleshoot The Device
Select Circuit (A10U16.
U14. U26 And Associ-
I aied Components).
Figure 8-H-I2. inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 4.
8 - 101 / 8-102
Troubleshoot The Device
Select Circuit (A10U13,
U14, U26 Ar>d Associated
Components).
Troubleshoot The Device
Select Circuit (A10U16.
U14, U26 And Associ-
ated Components).
Troubleshoot The Device
Select Circuit (A10U16.
U14, U26 Artd Associated
Components).
345S-0-8
Figure 8-H-13. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 3.
8-103/8-104
Troubleshoot The Device
Select Circuit <AiOU16.
U14. U26 ArKt Associ-
ated Components).
3455 -B -9
Figure 8-H-14. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 2.
8-105/8-106
Stare
With A Display Reading
Of "1" (Test J Failure)
Measure The Switch Drive
Voltage On Pin 1 01
A10U4.
'■'’’"'The Drive
Voltage Approx.
\ OVdc? ^
The Switch Drive
Voltage At Pin 1 Of
A10U6 Approx,
\ (JVdc? /
The Switch Drive
Voltege At Pin 2 Of
A10U8 Approx.
\ 0Vde? /
The Switch Drive
Voltage At Pin 14 01
A10U5 Approx.
\ 0 Vdc?
Check Switching
FET's
J A10016, 021. 036. 038
And Associated
Com-
ponents.
The Driver Input
Voltage At Pin 7
Of A10U4 >4 V dc
\
^ Is
The Voltage
At A10TP1
Approx. 0 V dc
Check A10U4 And Associ-
ated Components.
The Driver Input
Voltage At Pin 7 Of
A10U6>4Vdc
\ /
The Gate Bias
Voltage At A10TP3
Approx. 0 V dc
\ /
Check A10U6 And AssocI-
J ^
ated Components,
The Driver Input
Voltage At Pin 4
01 A10U8 Approx.
\ OVdc? /
Check A10U8 And Associ-
ated Components.
The Driver Input
Voltage At Pin 9 Of
A10U5 >4 V dc
\ /
The Gate Bias
Voltage At A10TP3
Approx. 0 V dc
\ 7 ^
Check A10U6 And Associ-
ated Components.
Troubleshoot The Attenu-
ator Circuit <A10U18,
037, 035, 038, 039 , 040
and Associated Com-
ponents!.
The Device Select
Signal At Pin 9 Of
A10UI3>4 V
's.^.^ak -To -Realty
Troubleshoot The
Logic
Ctrcuil (A10013,
022,
1 U26 And Associati^d Com* 1
ponents).
1
Ti iiubleshooi The Gate
6iis Amplifier Circuit
l/llOUl, Q5 And Associ-
31 td Components!.
The Device Select
Signal At Pin 9 Of
A10U16 > 4 V
Peak-To-Peak -
\
T aubleshoot The
Logic
Creuit (A10016,
022,
T And Associated Com*
1 pinents).
1
The Device Select
Signel At Pin 9 Of
A10U21 >4V
w Peak-To-Peak -
\ ? /
Troubleshoot The Device
Select Circuit (A10U21,
U14, U26 And Associ-
ated Components).
Troubieshoot The Logic
Circuit IA10U21. U22,
026 And Associated Com-
ponents).
The Device Select
Signal At Pin 9 Of
A10U16 >4 V
s._^^ak-To-Peak^
Troubleshoot The Gate
Bias Amplifier Circuit
(A10U1, Q5 And Associ-
ated Components).
YE^
Troubleshoot The
Circuit (A10016,
Logic
022.
U26 And Associated
ponents^
Com*
Troubleshoot The Device
Select Circuit IA10U13,
U14, U26 And Associated
Components).
Troubleshoot The Device
Select Circuit (A10U16,
U14, U26 And Associated
Components!.
Troubleshoot The Device
Select Circuit 1A10U12,
014. U2S And Associated
Co mponentsl.
Figure 8-H-15. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 1.
3455-D-lO
8-107/8-108
Start
With A Display Reading Of
(3 " (Test 0 Failure), Mea-
sure The Switch Drive
Voltage On Pin 14 Of
A10U9.
i i
is
Is
The Switch Drive
Voltage At Pin 1 Of
A10U4 Approx.
\ QVdc? ^
The Drive
Voltage Approx.
^ -HO V dc?
YES
YES
NO
NO
Is
Is
Is
Is
The Driver Input
Voltage At Pin 9 Of
A10U9 > 4 V dc
YES
YES
The Voltage
At A10TP8
-I- 10 V do?
Check A10U9 And Associ-
ated Components.
The Driver Input
Voltage At Pin 7 Of
A10U4 > 4 V dc
'^The Voltage^
At A10TP1
Approx. 0 V dc
YES
YES
Check A10U4 And Associ-
ated Components.
?
?
NO
NO
NO
NO
Troubleshoot The Attenu-
ator Circuit (A10U18,
Q35, Q37, Q38, Q39 , 040
And Associated Com-
ponents).
Troubleshoot The Refer-
ence Supply (All Assem-
bly A10U7 and Associ-
ated Components).
Is
Is
Troubleshoot The Logic
Circuit (A10U13, U22,
U26 And Associated Com-
ponents).
The Device Select
Signal At Pin 9 Of
A10U13 > 4 V
Peak -To -Peak .
Troubleshoot The Logic
Circuit (A10U13, U22,
U26 And Associated Com-
ponents).
YES
The Device Select
Signal At Pin 9 Of
A10U13 >4 V
^ Peak -To -Peak
YES
?
NO
NO
Troubleshoot The Device
Select Circuit (A10U13,
U14, U26 And Associated
Components).
Troubleshoot The Device
Select Circuit (A10U13,
U14, U26 And Associated
Components) .
3455-D-IO
Is
Is
H he Switch Driv?^
Voltage At Pin 1 Of
A10U6 Approx.
+ 1 V dc? (Ignore
s. The 2 Msec ^
pulse)
''^The Switch Drived
Voltage At Pin 14 Of
A1 0U5 Approx.
+ 1 V dc? (Ignore
s. The 2 msec
pulse)
Check Switching FET's
A10Q16, 021, 029, 031 ,
032, 038 And Associ-
ated Components.
YES
YES
NO
NO
Is
Is
Is
Is
The Gate Bias ^
Voltage At A10TP3
Approx. + 1 V dc?
(Ignore The 2 msec
"X. pulse)
The Gate Bias
Voltage At A10TP3
Approx. + 1 V dc?
(Ignore The 2 msec
X. Pulse) ^
The Driver Input
Voltage At Pin 9 Of
A10U5 > 4 V dc
The Driver Input
Voltage At Pin 7 Of
A10U6 > 4 V dc
Y
YES
YES
Check A10U6 And Associ-
ated Components.
Check A10U5 And Associ-
ated Components.
?
?
NO
NO
NO
NO
Troubleshoot The Gate
Bias Amplifier Circuit
(A10U1, 05 And Associ-
ated Components).
Troubleshoot The Gate
Bias Amplifier Circuit
(A10U1, 05 And Associ-
ated Components).
Is
Is
Troubleshoot The Logic
Circuit (A10U16, U22,
U26 And Associated Com-
ponents).
The Device Select
Signal At Pin 9 Of
A10U16 > 4 V
Peak -To -Peak
Troubleshoot The Logic
Circuit (A10U16, U22,
U26 And Associated Com-
ponents).
YES
The Device Select
Signal At Pin 9 Of
A10U16 > 4 V
^ Peak -To -Peak .
YES
?
7
NO
NO
Troubleshoot The Device
Select Circuit (A10U16,
U14, U26 And Associ-
ated Components).
Troubleshoot The Device
Select Circuit (A10U16,
U14, U26 And Associ-
ated Components).
Figure 8-H-16. Inguard Troubleshooting Procedure Diagram,
Auto-Cal Circuitry TEST 0.
8-109/8-110
Volt/Div.
2a
ov
Wi'«foTm 1
4 , *»**■••
Titne/Div.
5 msec
^ S^t ^
Turn The Instrument OPF.
Disconnect The Test
Jumper Located Between
A10U27 And U28. Use A
Clip Lead To Connect
A10TP9 To Inguard
Ground. Be Certain That
The Test Jumper On The
A3 Assembly Is Discon-
nected And The Plug Is
Disconnected From A1J7.
The Front Panel GUARD
Switch Should Be "In"
Connecting GUARD and
INPUT Low. Connect The
Oscilloscope To A14TP1.
Turn Instrument ON.
Using A Clio Lead,
momentarily Short
A10TP10 To Inguard
Ground. Apply - 10 V dc
To The 3455A INPUT.
The Majority Of The Inguard Logic And
The A/D Converter Is Working. The
Following Procedure Tests The Inguard/
Outguard Transfer Circuitry.
Troubleshoot U26 Turn-
On Circuit (A10U24, 19.
9).
NOTE
Thne Signah Are Difficult Tv Observe
On An Oscilloscope. An Alternate
Method To Determine II The Signals Are
1‘reseni Would Be To Use A Logic
Probe. Such As The -lip- Model I0S25T
Approximately 12 msec
NO .
Go To Outugard Trouole-
In Duration And
4 V P-To-P. Present .
shooting Section.
Troubleshoot F0 Transfer
Circuit (A1Q9, A10U35.
A10U27, AI0U28 And
Associated Components) .
»
Connect The Oscilloscope
To A3TP4.
1
Connect The Oscilloscope
To A10U26 Pin 36.
1 1
Troubleshoot The Transfer
Interrupt Circuit (A1Q7.
A10T2. A10U32, A10U27,
A10U28 And Associated
Components).
Troubleshoot The F2
Transfer Circuit (A10Q43.
A10U34, A3U9 And
Associated Components.
Figure 8-H-17. Inguard Troubleshooting Procedure Diagram,
Inguard/Outguard Transfer Circuitry.
8 - 111 / 8-112
3455-D-IZ
A
Measure The\_
Inguard Power
Supplies 16 Labeled
Test Points On The
A10 Assembly).
Are The Voltages
Within ± 6% Of The
Marked Values
Also Measure ± 1 0 V
Reference Supplies. .
\
Connect The Oscilloscope
ToA10U26.Rn 27.
Troubleshoot The Ingusrd
Power Supplies.
1s
The Clock
Signal (Waveform 2)
\ Present? /
NO Troubleshoot Clock Cir*
^ cult (A10U21, A10U23.
" A10U28 And Associated
Components).
Measure ^
The Bies
Voltage On Pin 38
Of A10U26. Is
This Voltage Within
t J25 Volts Of The
Value Marked
On U26
Replace A10R105 With
The Proper Value.
The Interrupt ^
Signal At Pin 29
Of A10U26 Held
High or Toggling
^ Troubleshoot The Inter-
■ ^ rupt Circuit (A10U9, 19.
21. 24, 21 28. 32 And
Associated Components).
/A10R105 The\
Proper Value For
The Voltage Marked
On A10U267
• 2X1 V- 737 kn
-23V-6.04kn
• 3.0 V - 4.75 kn
-3.5 V -392 kn
-4,0 V -3.32 kn
•4.5 V -230 kn
• 50 V - 2.37 kn .
Are
•^The Oats Signals^
On Pins 18 Through
26 Of A10U26>4
Volts Peek-To-Paak
\ ? /
NO Troubleshoot The I/O Cir-
- cult (AlOUn. 12. 13. 16.
16. 17. 22, 26,26,27 And
Associated Components),
Waveform 2
Volts/Oiv
1.0
iM.-
Turn Instrument OFF And
Carefully Remove
A10U26. Turn Instrument
ON.
Time/Div
.5 usee
-^he Bias Voltage^
On Pin 38 Of The
ICSocket Within
t .3 volts Of The
Value Marked On
U26?
U26 May Have Aged And
Replaced
Replace A10U26.
3455-B- 1 3
Figure 8-H-18. Inguard Troubleshooting Procedure Diagram,
Power Supply and Controller Circuitry.
8-113/8-114
Turn The Instrument OFF.
Reconnect The Plug To
A1J7. Be Certain That The
Test Jumper On The A3
Assembly Is Disconnected.
Turn The Instrument ON.
The Device Select ^
Signal Present At
Pln9O1A10U157
(This Signal Is A
Negatlve*Golng Pulse
Approximately 1 psec
In Duration And
> 4 Volts Pealt-To-
\ Peak.) /
Are \
The Signals At
Pins 2, 10. And 12
Of A10U1S > 3.5
Volts Peak-To-Peak
\ ? /
Troubleshoot The Device
Select Circuit (A10U14,
U26 And Associated Com-
ponents).
Troubleshoot The A/0
Switching Circuit
<A10U15. A14U1. U2, Q1
Through Q4 And Associ-
ated Components).
__X^The Voiiage^Ss.^^
At A14TP1 Greater
•s..,TI«n + 10 Vdc^
The Voltage At
Pin 14 Of The A14
Assembly > + 4 V dc
\
The Voltage At
Pin 15 Of The A14 [ NO
Assembly > + 4 Vde I
\ /
The Voltage At
Pins Of The A14
Assembly > 4 V dc
■s. 7 ^
Troubleshoot The Inte-
grator Circuit IA14U3. U4,
05 , 04 And Associated
Components).
Troubleshoot The
.2 V (5e- 1
tect And Absolute Value
Circuits {A14US,
U6, 06
And Associated
Compo-
nents).
Troubleshoot The 10 V
Detect And Absolute
Value Circuits (A14U5,
U6. 06 And Associated
Components).
The Voltage At
Pin 15 Of The A14
Assembly <t Volts
± .3 V dc? ^
Troubleshoot The 10 V
Detect And Absolute
Value Circuits (A14U5.
U6, 06 And Associated
Components).
The Voltage At
PinSOf TheA14
Assembly 0 Volts
. ± .3 V dc? ^
Remove The
from A14C2.
Troubleshoot The 0 Detect
Circuit (A14U6 And
Associated Components).
Troubleshoot The 0 Detect
Circuit (A14U6 And
Associated Components).
If. At This Point. The Problem Has Not
Been Isolated To A Circuit. Recheck The
Symptonrrs To Be Certain The Problem
Is In The Inguard Section Of The Instru-
ment. Refer To The Theory Of Opera-
tion And Schematics To Locate Prob-
lems Not Covered By This Procedure.
The A/0 Input ^
Voltage At A10TP4
\ -lOVdc? ^
Troubleshoot The DC
Preamp And Input Switch-
ing Circuitry (Schematic
No. 1). Be Certain That
• 10 V dc Is Applied To
The 34S5A Input Termi-
nals.
Force The Integrator To
Auio-Zaro By Connecting
A Clip Lead Between The
Cathode Of A14CR8 And
Inguard Ground.
ReferenceN^.
Voltage At A10TP7
\ -lOVdc? /
x'^The Reference's
Voltage At A10TP8
\ -f lOVdc? /
Troubleshoot The Refer-
ence Supplies (All Assem-
bly, A10U7, A14U1. U2
And Associated Compo-
nents).
The Voltage At 1
A14TP1 0 Vdc ± .2 Vdcf
\ ? >
Troubleshoot The Inte-
grator Circuit (A14U3, U4.
□4. 05 And Associated
Components).
Figure 8-H-19. Inguard Troubleshooting Procedure Diagram,
3455 - 0-12
8-115/8-116
Model 3455A
SERVICE GROUP H
Section VIII
8 H 8. OUTGUARD TROUBLESHOOTING.
8-H-7. This section contains information and procedures to aid in troubleshooting the digital
(outguard) portion of the 345SA.
8-H-8. A Signature Analyzer (-hp- Model S004A) is required to perform the Outguard
Troubleshooting procedures. If one is not available, it is suggested that the 345SA be returned to an
-hp- Sales and Service Office for repair.
8-117/8-118
NOTE 1
The Signature Analyzer Controls
Should Be Set As Follows For This
Test.
LINE ON (IN)
START "X. (IN)
STOP y (OUT)
CLOCK. y (OUT)
HOLD OFF(OUT)
SELF TEST. . . .OFF (OUT)
^ S^i J
Turn The Instrument OFF.
Disconnect The Test
Jumper On The A3 Assem-
bly. Disconnect The Plug
From A1J7. Set All HP-IB
Address Switches To The
"9" position (down). Turn
The Instrument ON.
Proper Operation Of The Outguard Test
Routine Is Indicated By A Number Or
Character Being Strobed Across The
Display And The Front Panel Enunci-
ators Being Alternately Lit-
NOTE:
The ALU Circuitry Is Working Correctly.
i
Go To The Device Select
Troubleshooting Pro-
cedure.
3455-B-I7
Figure 8-H-20. Preliminary Outguard Troubleshooting Procedure Diagram.
8-119/8-120
NOTE 1
Vw Siqnaum Aitalyier CiiiHrols
Should Be Set Ai hollows for I'liis
Test:
l.INt 0.\(l\')
SIAHI \. I'/iV;
STOf (out;
CLOCK y (out;
iiol.o on (OUT)
SLI.T ThST OH (OUl)
NOTE 2
The hillowiuy Is A I isi Ot Compoiieuls
Whkh Arc Cointeclcd To llie hrueessor
Inpi/I DjIij Hus.
Sdiemuiic 8
Schenwlk 9 .Si hcnuilic 10
MUh
AWI
AIV39
AIV2I
41013
AIU60
AW2J
AIUI6
AW27
AIUI7
A 11/34
AWI8
AIV33
AIS!
AWhJ
AIU43
AIH-IO
WAVEFORM 1
OV
»
fc. . -
I I
Time/Div.
.5 »^soc
Slai'
J
Be Certain Tiiat: The Tost
Jumper On The A3 Assein-
biy Is Disconnected, The
Ploi) Is Disconnected From
A1J7 And The HPIB
Address Switches Are All
Set To The ”0" position.
Torn The Instrument ON.
I
Cheek The Following Pins
On A1J6 For The Volt-
ages Listed (A3 Assembly
Plugged
n):
Pin
Voltage
A
■s 5 V t .3 V
M
-• 9 V i .5 V
L
Equal To The
Voltage Stamped
On A3U9 t .3 V
Turn The (netrument OFF.
Warning: Make Sure The
3455A Is Turned Off Or
Incorrect Signatures May
Be Present When The A3
Board Is Reconnected.
Remove The A3 Assem-
bly And Connect It To An
Extender Board. Place
Tape Accross Pins B
Through K (6 Pins) Of The
Extender Board (To Break
The Data Bus Connec-
tions) And Insert It In
A1J6. Connect The Sig-
nature Analyaer START
And STOP Inputs To
A3TP3. Connect The
CLOCK Input To A3TP5
And The GND To The
Chassis. (See NOTE 1 For
Signature Analyzer Con-
trol Settings. Turn In-
struments ON.
I
Troubleshool
The Power
Supplies II
The Voltage
Al A1J6 Pm
L Is Incor-
reel. Be Certain That
A3R3 Is The Proper Value
For The Voltage Stamped
On A3U9.
Voltage
Resistance
S.0 V
4.64 kn
4,5 V
2.87 kSt
4.0 V
156 kn
. 3.5 V
1 .37 kn
3,0 V
1 .00 kn
2.5 V
715 n
. 2.0 V
511 n
Troubleshoot The Clock
Circuit (Schematics).
1
Use The Signature Analy
^er To
Check The Signa-
tures On The Following
Pins Of The A3 Assembly:
Pm
Signature
B
3A9C
C
H3FH
D
P2F8
E
62PP
F
7078
H
F757
J
15FU
K
97C6
■t-5 V: 4F53
Connect
The Signature
Analyzer
START Anrf
STOP Inputs To A3TP2
And Check The Following
Signatu res:
Pin
Signature
B
8AAF
C
693A
D
C304
E
4F60
F
C43U
H
4CHH
J
6C93
K
9H95
■^5 V: CH29
Connect
The Signature
Analyzer
START And
STOP Inputs To A3TP3
And Check The Following
Signatures:
Pin
Signature
B
PC79
C
A102
D
7AAU
E
OC52
F
6UAO
H
H8CH
J
1P29
K
U478
+ 5V; 02C2
I
Waveforms^
Replace The A3 Assembly.
<; >4v
Replace The A3 Assembly.
k -To . P eak./
Connect
The Signature
Analyror
START And
Stop Inputs To A3TP4
And Check The Following
Signatures:
Pin
Signature
B
CHC4
C
6COP
D
A43P
E
129C
F
OC93
H
CP65
J
F517
K
6P03
■tS V: 79FU
Connect
The Signature
Analyzer
START And
STOP Inputs To A3TP3
And Check The Following
Signatures:
Pin
Signet ure
4
U5P6
7
23F9
9
2A6F
10
3A9F
11
6242
-i-5 V: 02C2
Um An Oscilloscope To
Measure The Amplitude Of
The Waveforms Al A3TP1 ,
TP2.TP3, And TP4.
I
The Mam Controller Test Routine Is
Operating Properly.
i
Use An Oscilloscope To
Measure The Amplitude Of
The Signals On The Proces-
sor Date Bus Lines At The
Following Points:
A1U34 Pins 5.9, 12
A1U42 Pins2,5,9,12
The Processor Input
Operating Properly.
i
Turn The Instrument OFF.
Remove The A3 Assembly
From The Extender Board
And Replace It In The
Instrument. (Be Sure To
Remove The Tape From
The Extender Board ! Turn
The Instrument ON.
I
Go To The RAM Trouble-
shooting Procedure.
3455-C-I8
Refer To Schematic 3 To
Determine Which Data Bus
Lme (09 Through 071 Is
Being Held. Troubleshoot
The Components Which
Are Connected To This
Line. ISee Note 2.1
In Most Cases, A High
Resolution Voltmeter
(1 pV Resolution) May Be
Used To Determine The
Bad Component. If The
Data Line Is Being Held
Low, The Component With
The Lowest Voltage
Reading Will Generally Be
The Faulty Part. If The
Line Is Being Held High,
The Bad Pan Will Normal-
ly Have The Highest
Voltage Reading.
When Troubleshooting The
Processor Data Bus. The
A3 Assembly Should Be
Removed From The Instru-
ment. IBcSureTo Remove
The Tape From The
Extender Board.)
Figure 8-H-21. Outguard Troubleshooting Procedure Diagram,
Main Controller Circuitry.
8 - 121 / 8-122
The following signatures ere for the outgo erd RAM circuits. The
signatures are taken with the start/stop inputs of the signature
analyzer connected to A3TR1.
NOTE
•*Th«« slgnaiurti apply whtn V44 and U4S art
removed from their tochets.
•To obtain this signature, a 10 K resistor must be
connected between the 5 volt TP and the probe Up
of the signature analyeer.
To check for proper logic tracer connections verify
signature of *S lest point Is 4FS3. The signatures In
>6V: 4F53 Oils section take one or two readings to stabllUe.
Pin
Signature
U34 1
7622
2
184P
3
1B4P
4
7622
S
7FPH
6
7FPH
7
0000
B
AFOP
9
AFOP
10
7622
11
UHUC
12
UHUC
13
7622
14
4FS3
U35 1
3A71
2
184P
3
184P
4
3A71
5
7FPH
6
7FPH
7
0000
8
AFOP
9
AFOP
10
3A71
11
UHUC
12
UHUC
13
3A71
14
4FS3
U36 1
4FS3
2
F281
3
AFOP*7078V
4
UHUC*F757*,*
5
7FPH*15FU*.*
6
184P*97C6*,’*
7
183F
8
0000
9
1PP6
10
183F
11
671 F
12
FF11
13
1UFP
14
143A
15
68P0
16
4F53
rin
Signature
U37 1
4FS3
2
F281
3
P6PH*3A9C*.*»
4
P961*H3FH*/*
5
8CPA*P2F8*.**
6
PH16*62PP*/*
7
4F53
8
0000
9
1PP5
10
4F53
11
93AF
12
U6FF
13
OHAH
14
4AC4
15
183F
16
4F53
U38 5
1PP5
8
1PP5
11
F281
12
1PP5
13
9037
U39 8
HF64
9
9037
U42 1
7822
2
P6PH
3
P6PH
4
7622
5
P961
6
P961
7
0000
8
PH16
9
PH16
10
7622
11
8CPA
12
8CPA
13
7622
14
4F53
U43 1
3A71
2
P6PH
3
P6PH
4
3A71
5
P961
6
P961
7
0000
8
PH16
9
PH16
10
3A71
11
8CPA
12
8CPA
13
3A71
14
4F53
Pin
Signature
U44 1
93AF
2
U6FF
3
OHAH
4
4AC4
5
1UFP
6
FF11
7
671F
8
0000
9
AFOP*7078’.’
10
184P*97C6*,**
11
UHUC*F757*.*
12
7FPH*15FU*.’
13
9037
14
7622
15
MSA
16
4F53
U45 1
93AF
2
U6FF
3 '
OHAH
4
4AC4
s
1UFP
6
FF11
7
671F
8
0000
9
PH16*62PP*.**
10
8CPA‘P2F8',**
11
P961*H3FH‘/'
12
P6PH*3A9C*.*'
13
9037
14
7622
15
143A
16
4F53
U46 1
HF64
2
7622
3
3A71
NOTE 1
f
The Signature Analyzer Controls
Should Be Set Follows For This
Test:
LINE ON (IN)
START. "V (IN)
STOP y(OUT)
CLOCK. J~(OUT)
HOLD OFF (OUT)
SELFTEST OFF(OUT)
NOTE 2
The Following Is A List Of Components
Which Are Connected To The Output
Data Bus.
Schematic 8 Schematics Schematic 10
AiU23
AWiI
AWSi
A1U24
AWI8
AW54
AW25
AW19
AiU63
AW29
A1U20
AW64
AIU3I
A1U26
AiU65
A1U34
AIU66
A1U3S
A1U67
A1U36
AiU6S
AW37
AIU69
A1U42
AW70
A1U43
Start
Be Certain That The Test
Jumper On The A3 Assem-
bly Is Disconnected, The
Plug Is Disconnected From
A1J7 And All HP-18
Address Switches Are Set
To The "9" Position. Torn
Instrument ON.
I
Connect The Signature
Analyzer START and
STOP Inputs To A3TP1.
Connect The CLOCK
Input To A3TP5 And The
GNO To The Chassis. (See
NOTE 1 For Signature
Analyzer Control Settings,)
I
Use The
Signature Anal- I
zer To Check The RAM
Output Signatures At The
Following Points:
Location
Signature
A1U34
Pin 2
184P
Pins
7FPH
Pin 9
AFOP
Pin 12
UHUC
A1U42
Pin 2
P6PH
Pin 5
P961
Pin 9
PH16
Pin 12
8CPA
The RAM Circuits Are Operating Cor-
rectly.
i
Go To The ALU Trouble-
shooting Procedure.
3455 - 8-20
1
Check The
Signatures At
The Following Points:
Location
Signature
: A1U44
Pin 9
AFOP
Pin 10
184P
Pin 11
UHUC
Pin 12
7FPH
A1 U45
Pin 9
PH16
Pin 10
8CPA
Pin 11
P961
Pin 12
P6PH
Go To The Device Select
Troubleshooting Proced-
ure.
Turn The Instrument OFF
And Carefully Remove
A1U44 And U45. Turn
The Instrument ON,
Output Buffer A1U35 Or
AIU43.
I
Check The
Signatures At
The Following Points:
Location
Signature
A1U44
Socket
Pin 1
93AF
Pin 2
U6FF
Pin 3
OHAH
Pin 4
AACA
Pin 5
1UFP
Pine
FF11
Pin 7
671 F
Pin 16
143A
Go To The Device Select
Troubleshooting Proced-
ure.
1
Turn The Instrument OFF.
Connect A 10 kO Resistor
Between The -t-B V Test
Point On The A1 Assembly
Artd The Probe Tip Of The
Signature Analyzer Turn
The Instrument ON.
i '
Check The Signatures At
The Following Points:
Location Signature
A1U44
Socket
Pin 9 7078
Pin 10 97C6
Pin 11 F757
Pin 12 15FU
A1U46
Socket
Pin 9 62PP
Pin 10 P2F8
Pin 11 H3FH
Pin 12 3A9C
Presettable Counter
A1U36 Or U37.
Data Bus Output Buffers
A1U34 or U42.
A Signature Of 0 0 0 0
Indicates The Output Data
Bus Line Is Being Held
Low. Troubleshoot The
Components Which Are
Connected To This Line,
(Sea Note 2.)
In Most Cases, A High
Resolution Voltmeter
(1 pV Resolution) May Be
Used To Determine The
Bed Component. In Gen-
erel. The Component Hold-
ing The Line Low Will
Have The Lowest Voltage
Reeding. When Trouble-
shooting The Data Bus,
The A3 Assembly Should
Be Removed From The
Instrument.
NOTE 3
Be Sure To Remove The 10
Resistor Connected Between The
Signature Analyzer Probe Tip And
The +S V Test Point.
Replace A 1U44 And A 1 U4S.
Figure 8-H-22. Outguard Troubleshooting Procedure Diagram, RAM Circuitry.
8-123/8-124
The following signatures are for the outguard ALU circuits. The
signatures are taken with the start/stop irtputs of the signature
analyzer connected to A3TP2.
NOTE
•To obtain this signature, a 10 K resistor must be
connected between the S volt TP and the probe tip of
the signature analyter.
To check for proper signature analyser connections
verify signature of *S V test point Is CH79.
+ 5V: CH29
Pin
Signature
U16 4
CPP3
s
CPP3
6
03FA
U21 1
6457
2
8CPU
3
9954
4
6457
S
UPUH
6
5042
7
0000
8
6A09
9
2131
10
6457
11
U330
12
HAF7
13
6457
14
CH29
U22 1
6457
2
9445
3
PP05
4
6457
B
CPOH
6
AH54
7
0000
8
2A69
9
P0F9
10
6457
11
530U
12
F84U
13
6457
14
CH29
U23 1
CH29
2
08U7
3
UHOl*
4
17A6*
5
2762
6
FH98*
7
3U52
8
0000
9
U23H
10
9U2A
11
32UF*
12
scoe
13
FAA3*
14
3S41*
15
6673
16
CH29
Pin
Signature
U24 1
CH29
2
A81P
3
UHOl*
4
17A6‘
5
37FH
6 ,
FHSe
7 1
9P30
8 1
1
0000
1
9
3UFF
10
94AU
11
32UF*
12
CH29
13
CH29*
14
CH29*
15
CH29
16
CH29
U25 1
CH29
2
6406
3
FAA3*
4
3541*
5
9C0F
6
150U
7
H4UF
8
0000
9
3UFF
10
3P95
11
21H1*
12
CH29
13
CH29*
14
CH29*
16
CH29
16
CH29
U28 1
6406
2
UCH6
3
9U2A
4
3US2
5
2762
6
08U7
7
0P6P
8
6673
9
HAF7
10
8CPU
11
UPUH
12
0000
13
2131
14
32AC*
15
F693
16
CPP3
17
5C84
18
3P95
19
HHF5
20
H4UF
21
H074
22
gcoF
23
87C2
24
CH29
Pin
Signature
U29 1
CH29
2
UCH6
3
FAA3*
4
3541*
5
87C2
6
150U
7
H074
8
0000
9
25H1
10
HHF5
11
21H1*
12
CH29
13
CH29*
14 !
CH29*
15
CH29
16
CH29
U30 1
A81P
2
5H5C
3
9U2A
4
3U52
5
2762
6
08U7
7
5C08
8
5673
9
9445
10
CPOH
11
P0F9
12
0000
13
F84U
14
1456
15
0129
16
0P6P
17
HAP6
18
94AU
19
3H92
20
9P30
21
59H2
22
37FH
23
1HHA
24
CH29
U31 1
CH29
2
SH5C
3
UHOl*
4
17A6*
5
1HHA
6
FH98
7
59H2
8
0000
9
25H1
10
3H92
11
32UF*
12
CH29
13
CH29
14
CH29
IS
CH29
16
CH29
NOTE 1
The Signature Analyzer Should Be
Set As Follows For This Test.
LINE. . . .
STAHr. . .
STOP. . . .
CLOCK. . .
HOLD . . .
SELF TEST
. . ON ON)
. ^ ON)
yfouT)
y(ouT)
OFF (OUT)
OFF (OUT)
Check The Following ALU
Output Signatures:
Location Sigrtature
A1 U34
Pin 2 6A09
Pin 5 5042
Pin 9 U330
Pin 12 9954
¥
¥
The ALU Circuit Is Operating Correaly.
. . I - _
Go To The Device Select
Troubleshooting Proced-
ure.
3455- D- ISA
I
Check The Signatures At
The Following Points:
Location
Signature
A1U21
Pin 2
8CPU
Pin 5
UPUH
Pin 9
2131
Pin 12
HAF7
Check The
Signeiures At
The Following Points;
Location
Sigrtature
A1U29
Pin 2
UCH6
Pin 5
87C2
Pin 7
H074
Pm 10
HHF5
Check The
Signatures At
The Following Points;
Location
Signature
A1U25
Pin 2
6406
Pin S
9COF
Pin 7
H4UF
Pin 10
3P95
Input Latch A1U25 Or
ALU A1U28-
I
Check The
Signatures At
The Following Points:
Location
Signature
A1U22
Pin 2
9445
Pin 5
CPOH
Pin 9
P0F9
Pin 12
F84U
Check The
Signatures At
The Following Points:
Location
Signature
A1U31
Pin 2
5H5C
Pin 5
1HHA
Pin 7
59H2
Pin to
3H92
Go To The Device Select
Troubleshooting Pro-
cedure.
Are
These
Signatures
Correct?
Go To The Device Select
J Select Signature 1^^^^
Troubleshooting Pro-
1 At Pin 9 Of I
A1U3125H1
cedure.
1 Check The
Signatures At
The Following Points:
Location
Signature
A1U24
Pin 2
A81P
Pin 5
37FH
Pin?
9P30
Pin 10
94AU
Input Latch
ALU A1U30.
A1U31 Or
' Check The
Signatures At
The Following Points;
Location
Signature
A1U23
Pin 2
08U7
Pin 5
2762
Pin 7
3U52
9U2A
5C08
5673
Input Latch
ALU A1U30.
I
Figure 8-H-23. Outgi.«rd Troubleshooting Procedure Diagram. ALU Circuitry.
8-125/8-126
NOTE 1
The Signature Analyser Controls
Should Be Set As Follows For This
Test:
LINE ONflNJ
START (IN)
STOP J'(OUT)
CLOCK y(OUT)
HOLD OFF (OUT)
SELF TEST OFF (OUT)
+5V; 02C2
Be Certain That; The Test
Jumper On The A3 Assem-
bly Is Disconnected. The
Plug Is Disconnected Prom
A1J7 And The HP-16 Ad-
dress Switches Are All Set
To The "0" Position. Tori*
The Instrument ON.
Connect The Signature
Analyzer START And
STOP Inputs To A3TP3.
Connect The CLOCK
Input To A3TP5 And The
GND Input To Chassis.
(See Note 1 For Signature
Analyzer Control Settings.)
Use The Signature Analy-
zer To Check The Device
Select Input Signatures At
The Following Points:
Location
Signature
A1U33
Pin 1
6242
Pin 2
3A9F
Pin 3
2A6F
Pin 4
23F9
^ Are
These
Signatures
Correct?
The Signature
At A1U46 Pin 3
— . 5AP5? /
The Signature
At A1 U46 Pin 2
•\ U5P6? /
The Signature
At A1U46 Pin 1
\ 5857? /
' The Signature ^
At A1U38 Pin II
\ CU60? /
A3 Assembly A1U32. U34.
U39 U42. U44. U45 Or
U46.
The Signature^
At A1U38 Pin 8
•s. P737? /
The Signature^N. yes
A t A1U38 Pin 12
\ P737?
A1U38 Or U41.
A1U36, U37. Or U38.
A1 U36. U37 Or U38.
The Signature ^
At A1U39 Pin 10
\ 2P58? /
'’^The Signature^
At A1U32 Pin 3
\ 02C2? ^
A1U19, U20 Or U32.
The Signature^
At A1U39Pin11
•\ 2FPA? /
A1U18.U170r U39
The Signature
At A1 U8 Pin 2
\ 4C96? /
The Signature
At A1U32 Pin 11
\ 02C2?
A1U11.U26 Or U32
A1U35, U43 Or U46.
''^The Signature^
At A1U32 Pm 4
\ 2FPA? ^
A1U32 Or U41
The Signature^
Ai A1U33 Pm 11
\ 5UH2? /
A1U21.U22or U33.
The Signature
At AlUSPin 1
\ 4924? ^
A1U8.U16. U16, Or U18.
The Signature
At AI U7 Pin 6
\ HC61? /
The Signature ^
At A1U41 Pm 13
\ AC4A? /
A1U41, U48, U54 Or U63
^ The Signature^
At A1U39 Pin 9
V. BAPS? /
Turn The Instrument OFF
And Carefully Remove
RAM's A1U44 And U45.
Turn The Instrument ON-
•"^The Signature^
AIA1U39 Pin 9
•s. Now 5AP5?^
The Signature
At A1U32 Pin 5
•\ U754? /
' The Signature ^
At A1U33 Pm 12
\ 7731?
A1U24. U25 0r U33.
Tyes
/ '* \
The Signature YFS
A1U32 Or 039
1
At A1U39 Pin 13 •
USP6?
The Signature ^
At A1U32 Pin 10
\ 4924?
The Signature NO ^
The Signature NO ».
1 AI 032 Or 041
AtA1U7 Pm 5 ^ •
A1U7 Or A1U41
C AtA1U41 Pm 15
A1U41 Or U64
H9H3?
0207?
The Signature ^
At A1U33 Pin 13
\ H4CH?
J 1 >0
\ AI 029. 031 Or 033. 1
A104. 08. Or U32.
A1U1 Or A1U7
A1U38, U39 Or U41.
A3 Assembly A1U32. U34.
U39. U42. U44, U45
**^The Signature^
At A)U33 Pm 7
\ 0066? ^
A1U33 Or U64
A3 Assembly Or A1U33,
U41.
RAM A1U44 Or 045.
The Signature ^
At A1U33 Pm 14
\ 5A8F? /
A1U23 Of U33
The Signature
At A1U33 Pin
\ F541?
A1U33 0r 051
The Signature
At A1U33 Pin 9
\ 1764? /
A1U33 Of A1Q7
The Device Select Circuits Are Operating
Correctly.
3455 - 0-19
Go To The
Interrupt
Troubleshooting
Proced-
ure.
The Signature ^
At A1U33 Pm 10
55PA? /
A3 Assembly Or A1U33
Figure 8-H-24. Outguard Troubleshooting Procedure Diagram.
Device Select Circuitry.
8-J27/8-128
NOTE 1
The Signature Analyzer Controls
Should Be Set As Follows For This
Test:
LINE ON (IN)
START. ~\ (IhlJ
STOP /(OVT)
CLOCK. y(OUT)
HOLD OFF LOUT)
SkLFTEST OFF(OUT)
+ 5V: 79FU
3455-D- 21A
Be Certain That; The Test
Jumper On The A3 Assem-
bly Is Disconnected, The
Plug Is Disconnected From
A1J7 And The HP-IB
Address Switches Arc All
Set To The "Q" Position.
Turn The Instrument ON,
I
Connect The Signature
Analyzer START And
STOP Inputs To A3TP4.
Connect The CLOCK
Input To A3TP5 And The
GNO Input To Chassis,
<See Note I For Signature
Analyzer Control Settings.)
Use An Oscilloscope To
Measure The Display Inter-
rupt Signal At A1U53, Pin
3. This Signal Should Be A
Negative-Going Pulse
Approximately 1 msec In
Duration Followed By A
Negative-Going Pulse
Approximately 2.8 msec In
Duration, Amplitude
Should Be About 4 V
Peak-To-Peak.
Connect The Oscilloscope
To A1U55 Pin 4. Press
And Hold One Of The
Front Panel Keys (Except
LINE, LOCAL And
GUARD). The Front Panel
Interrupt Signal Should Be
A Negative-Going Puls^
Approximately 15 msec
In Duration And 4 V Peak-
To-Peak
^*For instruments with serial number
1 622A01 505 and below the pulse is 5
msec wide.
Bpor Instruments with serial number
1622A01S06 and above end with a
Rev. D of the A1 board. The pulse is-.
positive when keys are pushed and
negative when keys are released,
Cpor instruments with serial number
1 622A03538 and above or where Ser-
vice Note 3455A-13 has been im-
plemented, the negative pulse is 1.5
msec wide.
Go To The HP-IB Trouble-
shooting Procedure.
Connect The Signature
Analyzer START AND
STOP Input To A3TP3. .
One-Shot Multivibrator
A1U48, A1C29, A1R42,
Gate A1U53, Or Decoder
A1U56-
Decoder A1U41. One-Shot
Multivibrator A1U48, Or
Latches A1U54 And
A1U63.
^ 6>i$ec If A1 C32 is a .66 fiF capacitor.
Connect
The
LOGIC
TRACER
START And
t STOP Inputs T3
A3TP3.
Press And
Hold
One Of
The Front
Keys.
Panel
RANGE
AtA1U55Pin3
-
1 The Same As
L The Signature
Gate A1U55.
J
Connect The Oscilloscope
To A1U55 Pin 3. Press
And Hold One Of The
Front Panel Keys. The En-
able Sigrtal Should Be A
Negative-Going Pulse Ap-
proximately 1 5 msec* In
Duration And 4 V Peak-
To-Peak
^ Panel Interrupt [mq
Go To The Display Trou-
Signature
k. AtAlU48Pin2 J
bleshooting Procedure.
42AP?
[YES
One-Shot Multivibrator
A1U48, A1C32, A1R41,
A1U40, Latch A1U58,
And Gates A1U47, Or
A1U55.
Connect A Clip Lead To
The EXTERNAL TRIG-
GER Input (Rear Panel
BNC). Connect The Signa-
ture Analyzer Probe To
A1U53 Pin 4, This Point
Should Be Low (Signature
Of 0000, and Probe Light
OFF.) Momentarily Touch
The Clip Lead To The
+5 V Test Point And Then
To Chassis Ground.
Go To The Display Trou-
bleshooting Procedure.
Use The Signature Analy-
zerTo Read The Signature
At A1U53 Pin 6. Be Sure
The START And STOP
Inputs To The Signature
Analyzer Are Connected
TOA3TP4.
NO .
Gate A1U53 Inverter
A1 U52 Gate A1U55.
Figure 8-H-25. Outguard Troubleshooting Procedure Diagram,
Interrupt Circuitry.
8-129/8-130
Th« fodowing $ign»tures an for tt>« outguard DisMav circuits. The
signeture* are taken with the nart/nop inputs of The signature
analyzer connected to A3TP3.
NOTE
*7o obtain ihH signaturt, a 10 K rtilstor mutt b«
conntcttd batwten tfi« 5 volt TP and the probe tip of
the signature anatyier.
**To obtain this signature, press and hoid the
front panel MATH OFF kay-
tTo obtain this signature, press and hold the front
pane! LOCAL hey.
tfTo obtain this signaturt, press and hold the front
panel DCV hey.
♦ 5V: 02C2
Pin
Signature
LM6 8
5AP6
9
CUA4
10
4F88
U49 1
66H6t
2
6464T
4
Probe Tip Blinks
5
3AAA
6
3818
U50 1
66H6t
2
3618
3
6F34T
4
401 Ftt
5
6464T
6
42APtt
8
401 F
9
42AP
10
42AP
11
66H6T
12
6464t
U61 2
42AP
3
CF21*
4
U65A*
5
31CU
6
7AAU*
7
3AAA
9
FS41
10
AU99
11
OC52»
12
1U38
13
6UA0'
14
H8CH*
15
6464
U62 6
02 C2
6
0000
8
0000
9
02C2
10
66H6T
11
64641
12
02C2
13
0000
U53 8
330H
9
31 CU
U54 2
5HAF
3
6UAO*
4
H8CH*
5
FU84
6
1P29*
7
CUA4
9
AC4A
10
4F88
11
1 0478*
To cheek for proper logic tracer connections verify
signature of *S V test point Is 0X2.
Pin
Signature
U56 1
3F6A
2
Probe Tip Slinks
3
6144
4
Probe Tip Blinks
5
A874
6
F4SA
7
PACP
9
5381
10
1P93
11
74AP
12
OPF4
13
6757
U57 1
330H**
3
401F1T
4
64641
6
64641
7
64641
9
64641
14
401F11
U58 3
6464t
4
64641
6
64641
11
64641
13
6F341
U59 3
OP6C
6
2H84
8
F400
It
543C
060 3
3071
6
0478
8
55H6
11
9A99
062 1
F084
2
COA4
6
4F88
7
SHAF
9
A29F
10
904A
11
6836
12
6863
13
05 A4
14
5AP6
IS
P579
063 2
6757
3
CF2f
4
U65A*
5
6144
6
7AAO*
7
3SFA
9
AC4A
10
54A7
11
0C52*
Pin
Sgnature
064 1
02C2
2
0066
3
0478*
4
1961
5
CH2H
6 1
F62P
7
60C6
9 ,
HA33
10
0395
13
1P29
14
0000
15 1
0207
1
02 C2
2
2S7C
3
CF21*
4 1
U65A*
5
3804
6
7AAO*
7
2690
9
60C6
10
1AHF
11
0C62*
12 1
HP7S
13 1
60A0*
14
K8CH*
IS
63 A2
066 1
02C2
2
H9C8
3
CF21*
4
065A*
5 1
9CC8
6
7AAO*
7 .
21C3
9
F62P
10
25CC
11 ,
OC62*
12
142F
13 '
6UA0*
14
H8CH*
15
A19P
067 1
02C2
2
06C1
3
CF21*
4
U65A'
5
AH7A
6
7AAO*
7
8FHP
9
1961
10
A2C1
11
OC52*
12
P6AA
13
60A0*
14
H8CH*
15
86SH
U68 1
3
3
4
5
6
7
9
1C
11
12
13
14
15
U69 1
2
3
4
5
6
7
9
10
11
12
13
14
1$
U70 1
2
3
4
5
6
7
9
10
11
12
13
14
15
U71 2
3
6
8
11
13
IS
17
Signature
02C2
89SP
CF21*
U6SA»
4P3H
7AAU*
F9A4
HA33
86 C7
OCS2*
379H
6UAO*
H8CH*
58 P8
02C2
3H62
CF21*
U65A*
AAHH
7AAU*
709A
CH2H
P2P7
0C52*
2851
6UAO*
H8CH*
0S2A
02C2
766P
CF21*
U65A*
26PP
7AAU*
086F
U395
F96P
OCS2*
OSOC
6UAO*
H8CH'
2867
A29F
P579
6863
USA4
904A
6836
5AP6
54A7
NOTE ;
The Signature Analyzer Controls
Should Be Set As Follows For This
Test!
LINE ON (IN)
START \-(lN)
STOP J‘(OUT)
CLOCK y(OUT)
HOLD OFF(OUT)
SELFTEST OFF(OUT)
NOTE 2
A Character, Starting At The Most Sig-
nificant Digit, Is Strobed Across The
Display. The Characters Displayed Are
l.2,3.4.5.6.7.8,9.l,l.".r,L, Blank And
Period. Each Character Is Strobed Across
The Display Twice. The Decimal Point
Accompanies The Character On The
Second Strobing Sequence. Also, In The
Least Significant Digit, The Decimal
Point Is Lit On Each Strobe. The Only
Meaningful Displaying Of The + And ■
Signs Is Before The Number 0 And 1
Start Their Display Sequence. The Time
Required To Run The Complete Test
Is 3 Minutes.
( Si^ ^
Be Certain That; The Test
Jumper On The A3 Assem-
bly Is Disconnected, The
Plug Is Disconnected Prom
A1J7 And All HP-IB
Switches Are Set To The
"0 " position. Turn The
Instrument ON.
I
Connect The Signature
Analyzer START Artd
STOP Inputs To A3TP3.
Connect The CLOCK
Input To A3TP5 And The
GND Input To The
Chassis. (See Note 1 For
Signature Analyzer Control
Settings.)
I
. W 1
Press And Hold The Front
Panel LOCAL Key.
•tev: 02C2
The Signature^^
N. NO 1
^ The Signature"^
'^YES .
ls^\.
*\At A1U61 Pin 2
1H8A?
At A1U61 Pin 5
1U38?
Gate AtUdI.
The Signature ^
1 330H When
INO
The Signature ^
NO 1
Input Latch A1U51 Or
1 Each Key Is
'“n. Pressed
•Sw At A1U51 Pin 6
31CU?
^ *
A1U53.
While Observing A1U57
Pin 14 With The Signature
Analyzer, Press Each Of
The Remaining Keys
Except The LINE And
GUARD Keys).
rvEs
Inverter A1U53, Switches
S1-S6, S10-S13, S23-
S28, Cable A2W2 Or
A1U57.
I
The Signature
1 401 F When
NO »
/ Is
The Signature ^
s. NO ^
Input Latch A1U51 Or
The External \
1 Trigger Interrupt
^NO >
The Signature ^
■s^ES ^
Inverter A1U52 Or Gates
1 Each Key Is
k. Pressed
At A1U51 Pin 2
42AP?
Inverter A1 U50.
1 Signature At
\ A1U52Pin6 ^
•C At A1U52 Pin 5
AH2C?
A1U46 Or A1U53.
lYES
lYES
Inverter A1U50, Switches
S2, S7 -S9, S13, S15-S22,
Cable A2W2 Or A1U57.
The Signature
At A1U58 Pins
3,4,6 6464
When The
LOCAL Key
Is Pressed
?
NO
The Signature
AtA1U58Pin1I Y
6464 When fc
Gate A1US0, Inverter
The LOCAL J
Kev Is Pressed ^
A1 U49 Or AIUSS
fYES
f At A1U58 Pin 13
Ino ^
Gates A1U50 Inverter
6F34Wher\
L The LOCAL Key .
A1 U49 Or A1U58
Is Pressed
7
^
The Signature ^
N. NO
/ * \
The Signature ^
V. NO ^
Input Latch A1U51 Or
Troubleshooting Pro-
cedure.
At A1U60 Pin 1
3818?
At A1U51 Pin 7
3AAA?
^ 9
Inverter A1 U49.
Connect A Clip Lead Be-
tween The Junction Of
A1C41 And A1R43 (Pin 1
Of A1U61I And Chassis
Ground.
Buffer A1U60 Or Inverter
A1U49.
I
Do
All Display
Segments And
Decimals Light?
(See Note 2 For
A Description
Of The Display
Operation.)
[YES
Use Schematic No. 10 And
The Display Signatures
Table To Troubleshoot
The Display Circuitry.
The Display Circuitry Appears To Be
Working Correctly, However, The Oper-
ation Of Latch A1 US8 And Output Buf-
fers A1U59 And U60 Have Not Been
Checked.
i
Go To The HP-IB Trou-
bleshooting Procedure,
Figure 8-H-26. Outguard Troubleshooting Procedure Diagram,
Display Circuitry.
8-131/8-132
The following signatures are for the outguard HP-16 circuits. The
signatures are taken with the start/stop inputs of the signature
analyzer connected to A3TP4.
NOTE
+6V; 79FU
Pin
Signature
U1 1
0000
2
6P52
4
6725
6
0A1A
8
A725
10
77H9
12
2A3P
14
79FU
c
10
3504
2
9FF5
3
A9F1
4
1682
5
FF71
6
0952
8
A8A9
9
HI 66
10
79FU
11
CC75
12 '
79FU
13
F2CA
U3 1
0000
2
79FU
3
0000
4
79FU
5
0000
6
79FU
8
0000
9
79FU
10
0000
11
79FU
12
0000
13
79FU
U4 2
0000
3
F509
4
79FU
5
0000
8
79FU
9
0000
10
79FU
11
F509
U6 2
69 H7
3
1018
4
1018
5
HC7A
6
HC7A
7
A2C5
9
67FF
10
1P03
11
1P03
12
CC75
13
28PH
15
5122
*To obtain this signature, a 10 K resistor must be
connected between the S voit TP and the probe tip of
the signature analyeer.
To check for proper logic tracer connections verify
signature of +S V test point Is 79FV.
Pin
Signature
U7 3
79FU
4
79FU
5
79FU
6
0000
UB 1
F609
2
CFF6
3
9668
4
PUA7
6
SP30
6
27UU
8
HI 66
9
A8A9
10
27UU
11
5P30
12
79FU
13
0000
U9 2
27UU
3
5P30
4
5P30
5
7907
6
7907
7
OOFS
9
P6U5
10
9U3A
11
9U3A
13
0952
IS
709H
U10 1
C5CP
2
FF71
5
9U3A
6
P6U5
8
709H
9
0952
12
925F
13
PC93
U11 1
79FU
2
5P30
3
CHC4*
4
6C0P*
5
9U3A
6
A43P*
7
F2CA
9
8AHS
10
A8A9
11
129C*
12
9H17
13
0C93*
14
F517*
15
C5CP
Pm
Sigrtaiure
U12 2
F4P2
3
CH2H
4
CH2H
5
2952
6
2952
7
509H
9
P823
10
91PF
11
91PF
12
CC7S
13
390F
14
390F
15
40 F3
U13 1
9U3A
2
A8A9
3
1682
4
A8A9
5
FF71
6
7907
8
4FFC
9
P6U5
10
5P30
11
9U3A
12
79FU
13
9U3A
U14 1
OOFS
2
9U3A
3
9668
4
' 7907
5
79FU
6
OOFS
8
PC93
9
9H17
10
27UU
11
SP30
12
79FU
13
27UU
U15 1
0000
2
CFF6
3
40CF
6
0000
6
77H9
8
2A3P
9
4FFC
11
; A725
13
709H
U16 1
79FU
2
CFF6
3
6P52
8
6725
9
PC93
11
0A1A
12
9668
Pin
Signature
U17 1
1P03
2
7F46
3
40CF
4
HC7A
5
7F46
6
77H9
8
2A3P
9
1018
10
7F46
11
A725
12
390F
13
7F46
U18 1
CH2H
2
7F46
3
6P52
4
CFF6
5
0000
6
6P03
8
6725
9
91PF
11
0A1A
12
2952
U19 2
CH2H
3
CHC4*
4
6C0P*
5
2952
6
A43P*
7
91PF
9
88H7
ID
390F
11
129C*
U20 2
1018
3
0C93*
4
CP65*
5
HC7A
6
F517*
7
1P03
9
88H7
10
28PH
11
6P03*
Pin
U26 7
3
6
U32 1
2
3
4
5
6
8
9
10
11
12
13
U39 10
11
12
13
Sigr^turs
CP65*
6AHS
0952
Foeo
U491
88H7
U491
C94U
0589
F509
C94U
3613
8AHS
3613
F080
7F46
0589
C94U
F080
NOTE 1
The Signature Analyzer controls
should be set as follows for this test;
LINE ON (IN)
START. (IN)
STOP y(OUT)
CLOCK. y(OUT)
HOLD OFF(OUT)
SELF TEST OFF (OUT)
+ 5V: 79FU
^ St^
Be Certain That: The Test
Jumper On The A3 Assem-
bly is Disconnected, The
Plug Is Disconnected Prom
A1J7 And The HP-IB Ad-
dress Switches Are All Set
To The "0" Position. Turn
The Instrument ON.
I
Connect The Signature
Analyzer START And
STOP Inputs To A3TP4.
Connect The CLOCK
Input To A3TP5 And The
GNO Input To Chassis,
(See Note t For Signature
Analyzer Control Settings.l
I
1 Use the Signature Analyzer
1 To Check
The Signatures
At The Following Points:
Location
Signature
A1U34
Pin 2
6P03
Pins
40CF
Pin 9
2A3P
Pin 12
77H9
A1U42
Pin 2
6P52
Pin S
0A1A
Pin 9
A726
Pin 12
6725
I
Check The
Signatures At I
The Foilowing Points: I
Location
Signature
A1U18
Pin 1
CH2H
Pin 9
91PF
Pin 12
2952
A1U17
Pin 1
1P03
Pin 4
HC7A
Pin 9
1018
Pin 12
390F
Are
The Signatures
At The Following
Points Correct?
A1U19
Pin 2
CH2H
Pin 5
2952
Pin 7
91PF
Pin 10
390 F
A1U20
Pin 2
1018
Pin 5
HC7A
Pin 7
1P03
Pin 10
28PH
f^S
Latch A1U11 Or Gate
A1U14.
Output Letch A1U16,
yft' The Signature ^
SJTES ^
Output Suffer
A1U16.
Gate AIU14, Or Inverter
\ At A1U14 Pin 1
Gate A1U14 Or
Inverter
A1U10.
\qOF8?
A1U8.
Bus Transceiver
A1U9,
Gate A1U13 Or
Inverter
A1U8.
Output
Suffer
A1U15,
Inverter
AIU3,
Gates
A1U2 0r U14.
But
Transceivers
A1U6 1
And
U12 Or Output 6uf-
fers
A1U17 And
U18. 1
Output Buffer AIU15 Or
Gate A1U7 Or A1U13.
Bus
Transceiver
A1U9,
Gate
A1U13 Or
Inverter
A1U10.
Output Buffer A1U15,
Inverter A1U10 Or Gates
A1U2 Or U7.
^ The Signature
At A1U15 Pins 1
K
Output Buffers A1 U1 5,
And 5 And
U18 Letch A1U4 Or
L A1U18Pin5
00007 ^
Inverters A1 U3, U8.
Inverter A1U1 Gate A1LI7
Or Switch A1S1.
Output
Buffer
A1U16,
Letch
A1U4,
Inverter
A1U3
Or Gate
A1U7.
I
1 Check The
Signatures At I
The Followir>g Points: 1
Location
Signature
A1U9
Pin 2
27UU
Pin 7
OOFS
Pin 9
P6U5
Pin 15
709H
Check The
Signatures At
1 The Following Points;
Locat ion
Signature
; A1U6
Pin2
69H7
Pin 7
A2C5
Pin 9
67FF
Pin IS
5122
Yyes
These ^
\N0 J
Signatures
Bus Transceiver A1U6.
^■^Coffect?/
lYES
I Check The
Signatures At
The Following Points:
Location
Signature
I A1U12
Pin 2
F4P2
Pin 7
509H
Pin 9
P823
Pin 15
40F3
♦
These ^
Latch A1U11 Or Inverter
A1U8.
Signatures
Correct? ^
Bus Transceiver A1U12
lYES
Use A Clip Lead To Short
The IFC Input IJ3 Pin 9)
To Chassis Ground.
3455 - 0-22
Output
Buffer
A1U16,
Latch
A1U4,
Inverter
A1U3,
Or Gate
A1U7.
1
Use The Clip Lead To
Short The ATN Input (J3
Pin 111 To Chassis Ground.
Inverter A1U3 Or Output
Buffer A1U16.
Use The Clip Lead To
Short The REN Input U2
Pin 16) To Chassis
Ground.
Inverter A1U3 Or Output
Buffer A1U15.
Connect The Signature
Analyzer Probe To A1U16
Pin 5.
Does
The Probe
Tip Blink
When The
Ground Is
Removed
From The
^REN Inpu^
f^S
The HP-IB Circuitry Appears To Be
Working Correctly. If The Problem Still
Exists: Check To Be Certain That The
Proper Procedures linguard Or Out-
guard) Have Been Performed. Trouble-
shoot The ROM And Page Select Cir-
cuitry On The A3 Assembly And The
Circuits Listed In The Troubleshooting
Procedures Which Have Not Been
Thoroughly Checked.
Output Suffer A1U1B,
Latch A1U4, Inverters
A1U3 And AlUBOr A1C1
And A1R11.
Figure 8-H-27 Outguard Troubleshooting Procedure Diagram.
HP-IB Circuitry.
8-133/8-134
^VlRAGE ftESPONCCNC
VRMS FULL SCAtC
CONVERTER
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240
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AUTO -CAL
H|Q»* REOOLUnOV
OUTGUARO MOTFCA BOARD
aTH O^F
lOVAC APPLIED TO THC IRPUT
A/0 COKVEffTER
INCUARD m6Th?R
AVPLT L»f
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CbOSCO ON ,lVtfc
MAIN CONTROLLER
CATWOL L»NC$
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,v« r«A 4 i-ti
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ao^? ON loovAc
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DISH. Ay
F»CU
^Wl^
ONN£
r f .as
s«fi>
ORiVl
CACJ^fS
P(L‘..-w«r»'
DATA »r
ON
? «<-i Kd
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AAV*
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CORV RIGHT I97G &X HEWLETT- PACKARD COMPANY
Figure 8-H-28. Detailed Block Diagram.
8-135
(»^/7
PKPUT
• ' 1 1
T ABSOLUTE
S 0 U 4 P
■ >
T .
(see 1 Ml
isec PARA P-A 2 )
lACe A*RA «- 53 }
(Set PAAA il-NI
♦ • AKf^TliR
t-rr AAA 4 ■ 9 »i
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ATTSNJATOR
uce AMA » «01
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• AUPlIFiEA
• AI4PUIFIER
VeC AAAA • AAI
Section VIII
Model 3435A
Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
Aitf
i>J A!>»-d6S10
1
A»s^fcM»iT» im;u >W
2AAP0
034$>'665L9
AIXI
0T6O-4470
1
CAFAOTOR.FXO 220PF *-10%
28480
0180-4479
«iJC4
oipj-2c»r
A
CAPACITuA-Fav UPK ♦>»< jgjaVdC
^M0
4160-2287
AlwLi
gi6«^3v9ft
A
CgPAkifUA^FXO lOiiPA *-lg« CtH
2AAo3
0169-3464
AC
JiAO-ill»9
2
LAPACiruit-i^xD 68i)gpf »-iiJ4 dOg voc PUivi
28480
0160-01 B8
A|J4.>
Ot AiiKtiiM
1
CfcPACi rUA-FXU «gOPF .aW&llVuC HlLA
2ACC9
0160-01 34
A4UVU
MlVJ-Ml
CaPACI rUR-FAU Agogp «->< UOJ..VX UK
2»4fr0
0130-0071
AIUC7
CAPAv<tUA>PXD AguPF iggggViiC ktK
28AB0
OI30-0071
AiUt»
gi ju-
13
UPAClfOA-PKD 39VgC TA
962 A»
15001 OS X9089A2
UPACJTUR^FXO 10F^20« <A
36282
15001 OS A90S9A2
AiJUii
i
UPACltuH-fAO J30F^tg« lOVX lA
S62P2
1S0D336X901032
AivUlA
4
gAPACitUA-PXO ia» 2>aVO^
2AAA9
0169-0127
AIJLa^
glA»>-a«66
caPAC 1 TOA-FAt) lOQPF »-|J4 tvgg»Vgw ttK
26449
0160-3466
A4JCIA
g L«AKj«o«i
LAPACITUR'F *g IJOPF f-lOS lUdakFM, CtP
264A0
0169-3466
Al«^Vi>
Jl94>*2iU«
«
CAPAU<Ult-FXg 47PF iggetFlH. NUA
26480
0l60-230e
AlwCito
1
CAPAUtUK-rxO V7P»- A-V« ^OUlVU. 4ICA
72ii6
UM13F A7OJ0590MV1C4
Aiau/
CAPALi CUM*Fxg iggPF iggaViX hica
26640
0160-2204
AiauiA
J|
4.apa;i iur^fau iaFw04 sgggu fA
8o26V
1500IOSXOOS9A2
AiJLiV
giat>*u^ja
CAPACI FuH-Fxi; igr»>ggt ^D«gb ta
S62»9
1500I0SX90S9A2
Aiaudt
glAO*«AAl
X
C«.PA»IT(>A>FAU l3(iPF IggieVsHi PUVP
2«489
OUO-4461
JibA>-^a.^r
UPAvIIuR-FaO IvPF ♦->« ^JPaVUC CtK
28489
0160-22S7
AAkJUi
gAPAtlTuR-FAb ggOUPf »-l0* 20J«Vl)C PUtVC
>6249
202P22292
Atuw<A
gi«<^23l>o
cAPAiiHOH-FAg grpp igo«vgw ni«.A
28489
0160-2J06
AiUw^>
gie«>-vl9j
1
UPAwl lUK'FxJ «AAOPA*gg4 A9VgC lA
So289
1509334X903562
J
^.APAvl rOA-FAg avlgp eigO'wA sgsVJ^. (.Ah
26489
0U0-S447
AAJL2/
gt ww^iuA f
wapaCI Ftift-F XI# .Jigf •lgg-g» >g««gt uap
28469
0160-3447
AiVb«»
giMV-wAr*!
vAPAiat TOA-Faw |guF*-ig4 &g<g« tA
>0249
l500l0oX902092
AWUv
vft
t >
caPauiqa*fau aJigp ♦hj-a^x igOstfui. C(k
24440
0160*2955
AUg^4l
W»PAcirUK-FAU aJlJF AgW-Ail* igOAVUi. C6A
26449
0160- 20SS
AlJLJtf
gi
waPaCIISK-FaU lgF*-gj< >gvgc fA
>6249
I5V0105K0050A2
J
C.PALl?UR-FAg .glgr AlOg-w. ^UNVub UP
26449
0169-1647
Al.4bi«
g|4H>*gfcig
CaPACl riJM-FAU |UFW3i 9gvgC FA
>6249
150010>X005942
Ali>0>
CAPAClfUA*fAU .OigF *dg-gy« |yO*v«N. CCA
264*0
Ul60*29S5
Aik)^>A
c^palUjk-fao .oiJF ••«NAg4 ugggu cu
2«449
0160-2055
A|gwi7
CAPACI ijk-fau .gigF •hj-2P« IPUaVul ctn
2d489
0U0-29S5
AAi>V>A
giuH2w»>
C•PAC|t^)A-Fxg «ai<JF »bg*204 IOCaPUC btA
24440 '
0160-2055
g i M*2u>>
CAPACItifK-FA.^ .UlJf ♦i.J-ggi iJUkfUC UK
24440
0160*2055
AlUwAt
CapacMum-Faw .uit>F ;oO«yi>L cfA
2o440
0160*2055
AIWw«^
CAKACI lOH-FXg .aluf PpJ-«W« iguKPM C(A
26449
OU9-205X
AiU^«»
CaPACi IUM-F4b mvlJf •«g*gy< igOpVDC CCA
264 49
0169-2955
AlOwAA
U|ol|-g^u»
CoPAUVUK-FAv UgPF *-lMA lyjguVJC CkK I
2C440
0160* 3466
AUc«>
gi Ar-(^.:>3
*.«pa:itok-fau iuF»«2g4 >uvgc fa I
>6269
I5u0l05 X90> 942
A10CA9
J&«AHbtoaig
1
CAPACI lUH-FAg igJf 4-U . l^VUC U
H249
1590336X901082
AlUtA/
capaci fOK-FAii .uigA ♦s.g-^pc iPUiivu. ua ;
24460
0l6O*20S>
AiJtA«
ai «g^«g> i
C«PACatuK-FAU «ylgp •Ay^VA ivOAKCC ClA
26409
0160-2055
AlUCAV
CAPAul laK-Mt) .glslF igg*VM. CkH
24««0
01«0-20S>
ac SERIAL NUMacRSienAOISOeANOAMVE: REPLACES Olt&OIS*
J L
8-136
Model 345SA
Section VIII
Replaceable Parts
Reference
Desigrtation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
CAPACitOH-PAO •OlvA lUOkVUC CtA
2B4B0
0180-2059
\i i C^«oJ)
&APACIIUR-PXU *0201 PAO^^OC A9kVOb b«K
26 *ia
0180-2605
CAPACifOfc'PAn .OAOP *6W-A0I A90VIK Lia
2d489
U180-2804
A|UL»A
b*PACIl0A-pAU 10F*-<0« bOVJb fA
V6269
1500 105X009 9 A2
a4
CAPAC JfUA-fXo lUF AxVOv bCk
Z*4B0
01A0-0IE7
A4«w>m
iJl %«3>U,iU
C-PaCI SOH- rAO IOF4-204 >0«>C |A
94Z«9
15001 D5X005JAZ
A4o«.>/
/
LAPA£I luA'PXO SUVUC Al
28410
01BQ-Z628
Ji «i>as>a4
k»P*UIUH-FXi} SilVuC <c
Z4480
0180-2820
*4
04 AJ-
CA^kU lUk-l-XU iuk«-^u> J<3M lA
»b2a«
1501)105X005082
AUg«»A
bAPAClfOH-FXJ IOOOOF*>0'40« ^sVuC AL
002ZO
25VB5UOOO
A4>ih>«W
CAPAblTJA-PXO 40UUJPA9rf-4u« ^>VOL A4
002ZJ
ESV6SLIOOO
AiguftA
Jl«kHW4:iJ
kAAALIIOA-AAU 1 i;F«-^W. tA
Vb28)
1500)05X005082
A|ugb>
J4 vO*(A.V>
1
CAPAC (fUk-PXU A^OOJF PlOJ-lUe I4VJC AL
20460
0180-0895
AiJLOv
04
cavacmuii-fa;. tJF»-xa; >o«ja ia
SoEal
I500105X0050A2
AiJUU
t
Uiuje-ut« fAP IVV ^»MA lU-I^
2<i*sO
1601-0666
AiJbH^
49«^l-0»Jv
blUilC-MN PkP MV tint lu-l/
2B4«0
I60I-0S6B
AlJUii
4VU:-4iO*>
z
4>lJUe*2*«A »*A&V uO*7 PO»«e« IC**.J|A4
I98IS
CO )58>4
4VU-OA40
UIUOl~S«ltCHJ«» AOV ^jJAA 0U«?
2B4B0
1901-0053
AUCK>
49bl«Uw7tf
OlJj£*>wnCi«|Nb FJV ^wjkA «4i» iM'f
Z8480
1601-0060
A40uk*
lSw4'* OJjJ
l)IU3A-MiI(.MI>M SJV juMA V.lS UJ-)
2B480
1901-0050
Al«tUK/
iyO(-uta«
>
UIJ3E-INK 16.AV >t Ul>-r PN'.AM IC-«.dB>A
d*7t)
il 10939-242
Al^^UKw
49ti4«‘Oa>J
blJJC-MlU.nl'a. AdV 2(iJ«A <«> dij-r
26AV0
1901-0050
AluCHf
tyi^-ut4<
Ula3A-ANK 1..AV it tlU-f P'Ja.AB IC>«aObAA
0471A
32 10939-242
AUCKU
49 W0*9b
OlOOfc'iNK 4«.^V S« 00-7 P.l*.%« Tt*««0eA4
0474J
U 10666-242
AI«ICMI^
49C4-OCJO
Uid>E-MllfcHl'«« AdV AlOMA lAl-7
Z8480
1601-0060
A4tfCHi>
19U-00>0
UlUUE-SHlICHiNb «OV ZVJ^A AN> UO-f
2B4B0
1901-0060
A4tl«.H4^
IVU«40U2
4
OIUOE-ZMM P.A7V »% 04>*7 Pg*.9fl IC*«*074 a
16616
CD 35526
Al«fVK4>
i9U-ogAV
UIOJE-ZNR B. IVV St OlB-r Pd*.*a ICo-d^A*.
284S0
1902-0049
I9gi-0v>j
Ui33E-SAIII.nU. AOV -dUMA iHi dJ-7
28480
1901-0050
M>>CkU
49€4-0o$0
UlUJE-SallChlNb «av 2U0>U ANS 00-7
28480
1901-0350
AWC449
|VC4-0^A»
OiaOt-&fch PAP MV Z5HA lw-7i
28480
1901-0588
AljCftiV
DlOdE-GEN PKf AdV 2»U lu-72
284 BO
1901-0508
Ai«|(.K^l
4901-wVO j
OiaoC-OeN PKP MV Z9kA lj-72
28400
1901-D588
AivCK£^
t9Ql-0»06
OIODE-OEN PkP 3dV 2S>«« 10-72
28480
1901-0508
aijLN^j
i90i*go>o
OIUdE-AMirCtU-vC AdV 2U0HA 7Ni UU-7
2B400
1901-0350
Ai^cM^V
l9Cl-0t/>0
U| J0£-4kITCHl)M 60V Z^OMA ZK> 0i>*7
28480
1901-0090
A40CH^>
49U-gj9tJ
010dE-Slliri.HlNC aov AOgNA 2N& DO-7
28480
1901-0050
*Ul.k4>
IVOi'OO^O
OIJJE-SallCHlNO «0V 2djHA 2h> OU-I
28480
1901-0050
AIJLK^/
4901-09^1#
♦
0|00(-OtN HKP 49 V »OHA 00-7
28480
1601-0176
AUUA<«
19C4-U9/A
OlOJk-OAN PkP AsV 90HA 00-/
28480
1601-02 76
Aii;u<U«
49Q»-aitt'»
OIQOA-iNA 4«*«ZV 9X 4>0-7 PlM«9a TC«*»OAAX
3A711
S2 I0636'242
A1«>M*4
490^*014*
DJUJA-ZNK 40*ZV 94 00-7 P0*«4a I4.«»«066<
OA7I6
ii 10669-242
Al^UKX
4904'00>J
01 JJE-S«nAN|NG tfOV 2UUM 2Ni OU-7
28489
1601-0090
AIjC4»>
tVCl-Oo^O
dIUdE-MlItHINO adv AddHA 2N> Od-7
20480
1901-0050
>ya-ou»j
bIdJt-SBiKHINb Bdv AddOA 2NS dO-7
28460
1901-0050
A4JtHi»
I90i«uu9g
OIdjE-SdIIbHIHC AOV 2dOHA 7NS Od-T
20480
1601-0090
AlUCuie
|9C4-0Ni9d
Ul JAE-tdllCHIMd «av 2UUHA ENA dO-l
2B480
16U1-0090
AlOUk^f
19U«00»0
01 jJC-SHniMJNC Aov Zoom zns oi>*r
28480
1601-0090
AlOtHiA
|yg|«OV>0
0lD0l-9«l1CMtNo Aov 200MA ZN& 00-7
28480
1901-0050
A40t.KJ^
19C1-0U9J
dldOE-SdUCHlBC «dV EddHA eN> gu-7
28480
1901-0050
AtUCHAl
i«ci-ouyj
dlUdE-tdllCHInC IdV EddKA ENt dU-I
28480
1901-0050
A 4I^CAA^
490I-OW9U
OI3dE-tl>n<.>1|Ni> l(iV EdSHA ENS OU-7
28480
1901-0050
A4«I4.HAA
i9Cl«iM>0
OIUJE-SalTCMINC 60V EUdnA ENS 00-7
28480
1601-0090
AlaCA4«
|904*0s»0
OIOO€-$W1TCHINC AOV ZOOM iHi OU-7
28480
1901-0050
A4UCH49
iyei-oo>u
diadE-SBlTLHtHC 6dV EudXA ENi Ob-7
28460
1601-0090
AltfCHA*
l9CI-0«»o
UlUUE-SHITCHlW. 4dV E3dHA EHE OU-I
28480
1901-0050
Mi>kl4/
49Cl*0w>J
0I0J£-SVJTCH1NC BOV Z09M 00-7
28480
1601-0090
41JCK*a
i90i*0v«»
OIUO€-P*A Ak^T 400V 790HA 0U-Z9
28480
1601-0026
A1JCK«9
1904-Ou^tt
0J09£-PhA MtCT 400V 790MA 0(^«V
20480
1901-0028
Ai«lLH>4
49€4*OUJA
UiUOE-Paa KEbI *OdV ESdHA dO-E9
28480
1901-0028
Aii;CK>A
|9CI«OwAA
OlUOfe-PvA xeci 40«JV 790MA 00-79
28480
1601-0026
A19CN»
49U-Ov29
OlOOE-PKt UU AOdV IbOHA dU-E6
26460
1901-0028
|9€|*00^U
QJOOC-PWA AkCT 400V 799f*A 00-Z9
28480
1601-0026
A4aCK9^
49 0l-4Kf^A
DIOdE-P«« RcCI AdOV 7>dHA UU-EV
26480
1601-0026
Aiauofr
49C4-ua^»
UldOE-PuR NECI «00V TSAHA dO-EV
E84V0
1901-0028
AiUCHtI
I9U-0v4a
OJOOE-PllA AtCf 400V 7$0MA 00-79
26460
1601-0026
A4aCK^A
49Ci- 0o2i
OlOOk-*AMA laCf 40UV /UOM 00-Z9
Z8480
1901-0328
niauw
4VC4«0v>0
UI00£-SmIICH1NC BOV ZOOM ZNS OU-7
28460
1901-0050
I902-0UA9
OlOdE-iNR s.tvv kt OU-7 Pd*. AM IC«*.dE2t
26410
1902-0049
AidUHX
49Cl‘*V^O0
dlOOE-RMl REEI lOOV l.SA
0471)
SA1B4^9
A4«jCa»>
4VC4‘>OAOJ
01006-FVA ALCf 400V i«9A
04711
SA1848-9
A40CA»A
l%0i-0l7i.
dl3dt-2NI> A7.»« Sa OU-IS PU-ld ICBa.dAI*
0471)
8£-U2li-3l5
Aisll»AO>
|9 0^UW99
OlOOS-ZAA 4*i>V 91 i>4>-7 Pu*»4« TC**«OZZX
22480
1902-0046
AiUbftAb
t9w-o»r»
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0471)
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8-137
Section VIII
Mode! 345SA
Replaceable Parts
Reference i
Designation
HP Part
Number
Qty '
Description
Mfr
Code
Mfr Part Number
AiULM»/
l9Q2*31d4
0I03E-2NK 3.42V 68 00-7 R0-.48 IC-*.BI8X
isns
CO 39034
AiUC«*«
190^0031
0Un-2.9R iHWli 14V »A AD«9m TCBA75t
04713
1N63618
AlaLN»> '
IvOi^Owag
OlOOE-SOllOnlM. SUV 2O0HA 2NS UO-7
20490
1901-0090
AtOCII71.na
IMt-OOtO
DlOQC-SWITCHIM 60V TODMA 3746 00-7
38460
1001-0060
AlJfei
ivT^ogf?
1
• »UA6c V aTCU
28480
1970*0077
AIsfU
■ Ii 0 -Ou »2
1
HUfc*^REb 26<8Hjm/ft .Ol-DJA
20400
8110-0062
12SI-2USS
ClAMECtOA'PC LUGE l4-CUNf/KlM 2-iU)«A
71786
262-16-30-300
CUNMEcroA-K EvOE t6-«UNI/tu8 2-ROaS
71709
262-16- 30-300
Ai(>J)
mi-4iw
1
LUMNEUOA-PC EDOE 16-C074T/R0W2R0WS
AUJ«
12it-02>
1
cuvaicruR iv^iN n posr I'fPi
20407
1261-4326
Aigj>
i
CUNHEOTOli 4-RlN H RUSI ITRt
27244
09-60-103112*03-0381
AiUKl
gA W>'g7«l»
1
RLLAVtMAO
28480
0490-0740
AiOAd
»)49t^0o«3
11
■ElAV-REEU lA tOORA lODOVuL 6V0C-CU1L
20400
0490-0603
AigAA
OA4t>«0<*«3
RtLAV-RElO 11 lOORA luOOVOO 6VOC-(.OIl
28480
049^ 0603
AIlM*
g4«HUbA4
%
A«lAV-«C(0 iA lOOM 2SUV0C SViK-COtL
29400
049^0004
D«9IH0iAA3
MLAV-Ueo li lOORA lOOUVX 6VOC-COU
20400
0490-0063
gA90-0»A}
fUlAV-A£€0 lA iOOHA iOdOVOw 9V0C-C01L
28480
0*90-0663
AitW7
U4 9fKgA44
*tlAV-«EEV lA lOORA 260VDO 6VUC-C0IL
20400
0490-0004
A LUKA
0491^0604
RCIAV-MED lA lOORA 260VUC 6V0C-C0K
20400
0490*0004
AiOKV 1
U49i^04O4
A€AAY-AA(0 iA lOONA 2MVgC SVOC*>CUlL
20400
0490-0604
AlOtl 1
910KU41
1
COIL-NLD 2 40 IX >8 U«46 .16308.47610
2422A
16/243
AIV1
mi>43ii
1
CONNECTOR 6-RIN F R06T TYRE
27364
23-01-3061
I2S1-34TS
CONTACT-CONN U/W ROST TYRE FEW CRR (R/OP11
26460
1261-3876
A10T3
1261-4310
1
CONNECTOR 2-RIN F POST TYRE
37384
22-01- 1031
AiOwl
30(^2028
4
tKANSlsrUR, flT
28480
9000-7026
Algw
>0i«*702S
thansistur. fei
20400
6080- T038
AIUIM
SOet-7047
9
IRANSISTM. FET KUVAR37 34U06
30480
6061-7087
AIJU4
60ef-7O47
iKANSlSrCMi f€T KOVAHaF Sid09
26400
5081-7047
Aig4»»
i«9»*Oioa
1
tAAN91SlUR-j7Ct DUAL N-CHAN O^HUOt SI
20400
1699*0300
Aiog»
1AS^0«47
t
TR4NSiSI0A-JFET OUAl N-CHAN O-NOUE TO-TI
20400
1699*0247
Aiuw;
IA94-0071
13
TKANSISTOCI NRN SI FD-400M4 Ft-200RH2
28480
1094-0071
Aigyd
1433-IXM»»
k
fMAHSlSfOA PV SI PO-JIUMM PT»47>Mh2
20400
1093*0006
AIJW9 1
i91»-0020
THANSlStOA PNR 61 RO-430R8 Fr-lsDMHl
20460
1093-0020
Aiww4i 1
l«SA-<UI71
rPANSISrOR HPn si Pt^lOgM Fr«200MH2
26400
1854-0071
AIUwIa
1834-0087
y
TAAVStSTOR t%PH SI P0«i4OH«i Fr«7SNH2
20400
1864-0087
Aiawi>
>0A«-7wiA
TKANSISTM* FkT
20400
6088-7028
AiugiA
50aA-7024
fKAHSISIOAe FET
2848U
9000-7026
Alggi>
6061-7047
laA9SISI0K« FEI KOVAKSF SSOOS
20400
6061-7017
Aiugio
6061-7047
TKANSlSTlM* FET KOVAKsF SSOOS
20400
6061-7087
AlUbif
109^0^44
i
rkANSISrtK-4Ftl DUAL N-U4AM U-MJOE TO-Tl
20400
1699*0746
AiawiA
6061-7047
TKANSISTOAe FET KOVAKSF SMO>
28480
5061-7087
Aiggiy
6061-7047
TKAHStSTCM* FAt KOVAASF SiOOS
20400
6061-7087
AAiM^i
6061-7047
IXAVSISIllA. FET KUVARSF 6^03
20400
6061-7087
A10U«
1873-0420
11
TAANSISrOK 2N4S91 NKHAN O-HOgE
04713
3N4391
Aigg^i
1834-0087
T84N61ST0K NRN SI F(M440H» Fr*r6RHZ
28480
1094-0067
AtJ«2*
l»94-007l
IKANSUTOR NPN SI PU»IOOI«M Fr«200MH2
20400
1864-0071
Aigg^»
lsM-0071
f«aNSlSTOa NPN SI PD-SOOMi FT«200»»U
28480
1854-0071
Aijgdo
1«S3*0W0
TKAMSlSm PNP al PD«>OU>lil Ff*lS0MH2
20400
1853-0020
AtUiMT
1«S4^A6A
4
IKAN818I0R 4-417 N-CHIN O-RQOE 7(7-72 81
20400
1099*0300
Aiog^i
1866-0448
T4tNSI8I(JR J-41I N-CHA8 O-RUOl 10-72 SI
28480
1699*0300
AiOg^v
1853-0468
IRANSISIU* J-FE7 IXCMAN U-RUOE TD-72 SI
28480
1855-0348
AltftMl
1439- 024«
2
• lAANSISIOR. 4FE7 N-CHANHEl 2N4837
20400
1099*0244
•logAA
1863-0244
• IAAN8ISI0M. 4FET IT-CnANNEl 1N4867
28480
1855-0244
Aijgaa
IAS9«g42a
iMANSISTOa 2-^47 2f«4i9i N-CKAN O-MUOE
04711
2N4391
Algg»4
4099- 042U
I88NS1SIUA J-Fll 2N4391 H-CHAN |7-R«7U1
0*713
2N4391
Aig«i>
18 66-0448
TmANSUIO* 4-4ET H-CRAH 0-R004 70- 72 SI
28480
1855-0348
AtUWIo
TkANSISTOP J-fET N-CHAK D-AOOt T(H72 SI
20460
1865-0348
AiggAf
l«3>'024(»
T<u.vsisra*-44ir oual n-ohav »-ru<k 7o-ti
28480
1856-0248
AiUOAA
6061-7047
lAANSISTGlPa FbT AJVAHSF SSOOS
20400
5061-7087
Ai0gAA
6061-7047
tKAVSISrUR. ftl KUVARIF 64003
20400
6061-7087
46S9-OA40
IhANSISTUA 0-FET N-CnAN (7-RU4C tU-72 SI
28480
1866-0348
AlOlHl
TaAASISTOA PNP si P4MA0OIU FT«lSi>fM2
20400
1093*0020
AiiNAd
1466-0020
lAANSiSIOR RNR SI RiXSUURa F7-130RN2
20400
1853-0020
AlUtfAi
iKAMSISfOH PNP SJ PO-iUOH« M«IS0HN2
20400
1853-0020
AiggAA
1864- Oo7l
TiiANSlSTUa NPH SI PO^jJOf^si FT«2adPH2
20400
1834-0071
Aig«r«»
1864-0071
|4AN<IS70H RPN 61 R0-4l>0na fI.200RH2
26400
1864-MTl
Aigg«.*
1864-0040
IV.ANSISruR FNR SI RD«40«H8 ET-160Rn2
20410
1863-0020
A&gMi
2
AkSIsTA 90R SA U pH IC«DP-20
01637
OS-9
Aig«u
J«u-gg
HESJSllJh SUA SS 9H PH TC««H~20
91637
RS-6
AlOKi
g69d-A7.»l
u
AtSlSIOA ItfOK >4 •2SB CC rC-*400/*990
01121
081046
Aign«
08$8-873r
■litSIOR 1008 6* .238 CC IC<-4d0/4800
01121
C81046
Algo
goaA-4>3»
4
fU.SlS7W 19A >S «2SH FC rC*-400244(M
01121
tOl 636
0844- 244S
2
HbSJSlUR 240K 34 •23H H TC«*HM/«9dg
01121
C02449
AiaH7
04d>-444>
K-SISICM 2408 64 .264 Ft 1C— 800/*900
01121
082446
AAgno
U7 37-’0^4A
2
RLSIilOR 168 14 .1238 f IC-04-100
2494S
C4-1/8-T0-1502-F
AiJHV
g7>7-044»
H^SIaIUP iSK 14 «129 h F ?(.•»»• 100
24946
C4-1/8-T0-1602-F
A1»HU AC
04 85-I326
9
RlalSiOR IJK >< .268 Ft It— 400/*700
O1607
C81326
AC SERIAL NUMBERS
1622AOI806 AND ABOV
E: RERLAt
:ES 0863-3036
L
A 04OMCR71 •fdCn77W0«ve«'lvte
8-138
Model 34S5A
Section VIII
Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
1
aaSISrOK ).3K S« .ZSh fC IC*-bUl)/*70U
01124
C93325
klOKU
uovftur
Hc)l$(Cn 400A bS .2&0 Cl. fC«-900/»MO
04424
COIObS
J603*t0L>
2
aisurut 100 st .asa fl 7i*-«oo7*soo
01121
C94049
1
■UalSICM 8.ZK S« .ZSb Fb rc>-*00/«100
OllZl
C88ZZS
AlVHio
i>»W*4»9>
XSISIQH IM li .ZSa F( tc*-*00/*«O0
oim
C915iS
AiUKi/
0o4WV>>
a
(bSISIIW ZUK a« .zsa FC t(.>-4dO/>DOO
OUZl
C92035
Aijhi*
d6M*447y
2
ACSISIUK 1*K 14 .12S* F H-Oa-lOO
Z4S4S
C*-178*rO-l SOZ-F
i)b«S-3iae
1
RH>i$l(M 47.0 a 40 •14'>* f 7C*i)»-400
Z4S4S
Cb-178-ra-178Z-F
AIOIUI
t(biO>»»2»
i
UsISIUH s.aa at .ZSa Ft TC»400/>ro0
01424
CbSbZS
AlJK^lc
iUSISIW S.«K St .ZSM FC rCa-«o0/FT00
OtlZl
CBS8ZS
AIJH^J
0»«>»4>J»
MStSlOH 1st S( .2S. FC U— «00/«b00
OllZl
C81S3S
AtJlU*
J6M-A77r
■
AfeSUIW* FAD 4000 UHM •U>
20MO
0898-8777
AiOlU>
t)69«-AA79
MttlSIUI tbt U .izsa F IC*0*-ldU
24945
C4-120-T0-I402-F
AliJiUB
06(0-1029
1
KcSISIOt l.bl St .ZSM FC ILa*«00F«Z00
01121
C818ZS
AiJ«27
McSiSIU* ZZO St .ZSa FC tCa-bOO/aaOO
OllZl
C8221S
A
J6IO-9409
7
•atlSIUK Slot St .Zsa FC tc— 4UO/FOOO
OllZl
C9514S
A4^R£4
i>AW-ar*i
KcSUrA iOOK 9« .260 TC—400/*b00
04424
C8I04S
AiJKJt
O6tt>-4oi»
IS
Ktsism lot St .ZSa FC rc— 4UO/*700
OllZl
t6i035
jaa3-»a/!>
XSISlOa S.at St .ZSa FC 1C— 4007*700
OllZl
C95925
AliW^i
J60i-9il»
4
aesisio* 410 S( .Zsa FC IC*-4dO/*600
01421
csoiis
A4jA>A
U«W-S/iT
Re6l$tQH 400R bX .29lr CC rL«-400/»000
01121
C8I04S
1
USISlUt 7b. 0 11 la PH IC-0*-20
9ISS7
■ S-lt
AUkJ«
0*9(4-0/76
4
• A£SliTOH« Fh> 40 UHH «06
29400
0898-8778
AlUKi/
06«>-2d)6
KtSIStO* ZUK St .zsa FC ft— 400/*b0U
OllZl
C92035
AiJHd»
•ivM-ai?}
AC$|$tgRt FAD 4000 UHH .US
29490
0848-8777
AlOH)^
Oo9(i-I7i7
RFSISU* 400K Si *290 CC rc«-400/«d00
04421
C8108S
A4J»Ai
a*99-Oo9i
MSItlOR ZOt It .izsa F rc-UF-ZS
OS080
ARE 555
A4jR*£
069»-0«y2
4
AkSlSIQB UOR 4S mlibn F 71«0^-2>
09999
PRC55S
AiaA«>
U«90-«*93
tesISIOR ZW It .IZSa F IL>0*-ZS
03996
PH655S
AitM«4
joM-erir
A£SISf(« lOOR bt .260 Cb 7C— 400/9$00
OU24
CBIObS
A4JR«>
06l)-6l99
i
U^ISfA 9lK bt *2Sm fC Tv*-4*IO/daOO
04121
C8SI3S
A4JMA»
0O90-6777
AeViSim* FkD 4000 OhA .il»
29485
0898-8777
AidH«/
U8U-34B1
ACSIbllVE SE1. lon/IOCKOHM (INCLUDES R63I
29490
0911-34*1
AiaM*
141U-U>.>2
2
H£T«OAA-HLb 8-PlN-SlP «4-PJN-»PC(» 7X100K
Sbzas
246CK104X9PR
AiJH^v
Nc4«OkA-JU 6 a-PtfF-llA .4-Pll«-SPC0 7X100K
5*299
246CH104K9PM
AiJKdl
I>o90- tf7i7
HfeSISfOR 4U0R it •ZiU CC IC«-900/»000
01121
C91045
AiNlK>^
Qba>-2U79
HLstSfUK ZK St .zsa FC 1C— 4007*700
01424
C820ZS
*1JR»
064l>*6Ob9
4
Ac$lS7CR 6.2A >1 .250 PC tL*-CO0/*700
01424
CB82ZS
AiJK»4
do94-7ji2
2
klblXttM IH U .42S0 F (C*0*-100
49704
RF5Cl/9-r0*iOO4-f
Al J«>»
i)6««-7Ji2
AftSi$ICM in 42 .1250 f IC*9^400
lotoi
NFSCl78-tO-IOOb-F
Aiao*
06U-949S
RftSUfW S40R bt *250 FC 4..*-»00/«900
OUZl
C8S18S
A4JK5/
U« 90-6 J2J
>
XSISIUI St .IX .IZSa F lc*0*-ZS
03999
FNESS-178-19-S001-8
JO9IH6120
RtaiSlQR 9K .4C .125* f TC«0«-ft>
03881
PRES5-l/9-f 9*5001-9
AldA»9
a«9i-l094
z
kr&|$t(3R 400R iOf 20 Ct IC*O»A02
01121
HBlObl
A4JR61
UOS3- 4oo4
R^aisicai loot lot za CC tC'OaatC
04421
H61041
A4d<»2
0oS0-6/i7
trSlilUR loot SI .ZSa CC 1^—4007*800
01121
CSIObS
A 1 dKft J
AlSlsIlVC Scl. I0N71O0K0HMIINCLUDESR4TI
29495
0911-3464
AIIIRD4
JoW-0/7 7
HfSIStCM* FAD 4J4J0 CHA *U>
294 90
0898-8777
A4dR»>
a* I43-7SA9
4
rtl^lSlOR 751 it «2>0 fC IC*-9OO/*0OO
01121
C87S3S
AlJKfrO
2lOCH)^«i
4
RLSlSrOH-THHA 50 404 C fUP^AOJ 4-fRN
73138
7Z-101-0
A4dM<»7
06£1-2J^>
XsISIOl Zt SI .Zsa FC rc— 4007*700
0U21
CBZOZS
AidR»a
0*Vl»-e7i7
HtSiSlUt lout St .zsa LC 1C— 4007*000
01121
C94045
AlvA69
07ir-o«6»
RLsIStdl lout It .IZSa F IC*0*-100
ZbSbS
C8-178-7O-I0U3-F
*tJK7t
H451SUA 40UR 41 .42Sfl F fL«0»-10U
24549
Cb-178-tO-lOOl-F
AAJH72
do«>- 2ui»
0e5l$IOR 200 >4 *250 FC fC«-4007*6UO
OUZl
C8Z01S
AlJKfi
1
KcSISiat bl.W It .izsa F (C*0*-10U
24546
C4*|/9*ro**192-F
A4iM/A
066>-6/fc>
s
aisislut 4.7t SC .zsa FC IC— 4007*700
OUZl
CB47ZS
AIJ*7>
JoU-lUi>
AlSISIOI lot St .zsa FC lL*-4a07*IUO
OllZl
Cb|035
aijh;»
0V«>- 2w>9
HcStSlUR ZOt SI .tSa Fk IC*-4007*«UO
OllZl
C8Z03S
AijK7t
OodJ-A/29
H15ISIUH *.7R 5ft .2>M F(. U*-W0/47d0
01121
C88T2S
A4JR7«
d* 6A-97«9
KISISIU. 4.7t SI .ZSa fC >L*-4007*700
OllZl
CBbfZS
A10A79
00B6'8777
RJ ftISlUR FXO 1000 OHM 00
28480
OeW-8777
A4jr«4
oess-ms
RtSISlOK ZK 6K Z$W FC TCXOO/*OO0
01121
C920»
Aiu«»a
4
HtaSiAlOM V40K bt Ubts PC i;*«d00/*909
OU24
C89I8S
A4ij«e>
ubve-aor
tkSISIOR lout St .zsa cc 1.— 4ao7*auo
UIUI
C91045
«tJKa*
R.siSIUK lot sc .Zsa FC tc— 4007*700
OllZl
C9403S
Aijn»j
Oo%-tf 7i7
KISI5K* 4dwK 5« *2>a CC l*»-400/*«00
OUZl
CBIObS
A4UAo«
•USiilURe fAO 4J00 uHH *05
20490
0699*9777
AiUHa/
O6*/B-0/r/
Hft6lS7UR» PXO 4U00 UHH *0>
29460
0699*9777
A4dN9«
gO0i->14>
ft
RtlUrOR bt *250 7v 1C*-400/40tM
OUzl
CB5U5
A4UH»V
Uod)-Vii»
trSISIW Slu St .ZSa FC tC*-40U7*bo0
OUzl
C8SUS
AlgA94
J«AA-dvi9
Hl5ISI^ 20 a 54 *250 PC U*-4J02*20i>
04124
L8Z0FS
A4JR94
oo4i*«rw>9
acSiSILN Zot St .ZSa Fc lc*-4u07«8>M
OllZl
C92035
44aRy»
dC«i-jg£9
A
a.SlSIOt Ft St .zsa FC 14—4007*700
0U«1
C880ZS
A4aH4A
UaS>-A>7S
a^SlslUR It s; .Zsa Fc rc— 40J7»7dO
OlUi
CBZOZS
8-139
Section Vlll
Model 34S5A
Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
AlUH9>
RASISrOR 200 >S .2S« FC IC«-*0i>/»600
01121
C8201S
A10M9O
i7oaS-2uiS
AkSISIOR 200 >S *296 FC IC--40074600
01121
C82015
AiOAvr
RtSISIIM 2A >S .2>H FC fC— A00/F700
01124
C82025
A40K9*
USAA-202S
RaSISTUK 2K Si .2»M FC 1C— A00/*7M
01121
CB202S
A|gR99
aBBS-a7T7
RfAlSKB FXD 1000 OFM JIB
2S480
0B8e-«777
AI0A10I. men
0683-2O3B
RESISTOR 70K S% FC TC— AOO/«eOO
01171
CB203G
A10R10S
OBSS-472S
RESISTOR 4.7K 6% 26W FC TC- -400/<B00
0II3I
CB877E
AIMIM
06S3-J33S
1
RESISTOR I3K n MH FC TC'-AOO'fBOO
01l2t
CS1336
AIRI06*
1
PAOOINT. I IKT IP/0 0346E-43S01I
0BRR-»S9
RESISTOR 7J7< F
74S46
C4-t/B-T0-’»71-F
oete-3AS7
1
RESISTOR B.IMK 1« .I7SW F TCW7— lOUin.SVI
246AB
C4-I/S-T0-008R-F
07B7-0437
1
RESISTOR 4.7SK 111 .12SW F TCHTi-IOOiaOVI
24S40
C4-1/»-T0- 8751- F
07S7-O4S
3
RESISTOR 3S7K l« .I76W F TC-OF-IOOI 3.SV1
24546
C4-I/B.T0-382I-F
07&7-(Mn
3
RESISTOR 3J3K l« I7SW F TCKK-IOO(4.0VI
2464S
C4-I/B-T0- 3321 'F
OBSB IDE
1
RESISTOR 7SK IK I75W F TC^-IOOMSV)
74S4B
CA-1/8-T0-280I-F
OE8B-31SO
\
RESISTOR 7S7K IK .I7SW F TCW>*-ia0|.6.0VI
3464B
C8-I/K-TO-237I- F
AIJMI
0797-0«:7A
RtmilSl I.2U IS .12>M F tC*U*-100
2A546
C4-I/8-T0-1213-F
AldHiUI
ti«»-2u2S
HLSISlUR 2A SS .2SII FC TC— A00/*700
01121
C8202S
AiDHlJv
riAiU-*72S
RlSISrOR 4.7R 58 .250 fC TC»-400/*700
01121
C84725
AiUHiOV
ObA»-A729
RESlSItft A.TK SS .2»a Fc 7C— AO0/A7O0
01121
C84725
AIW11I aa
06BS-472S
RESISTOR 4.7K BK .3SW FC TC«-A00/«700
01121
CB472S
Aijsi Ae
i>A9^0eg2
4
iairCH-HAO REEO FURR A 3VA 12U0V CONI
28400
0490-0802
Aiaii
9io^a«ra
4
THANSFORMtH. PULSE
28480
4100-0478
Ali)l2
11GO-M79
1
UANSFWRCAo PM.SE
20480
9100-3879
AlOUA
1E2A-OAA9
2
1C RC 44S6C OP AHP
0A71S
HC1434CC
AiUil^
I92^0k99
2
IL HA 2A2S UP AMP
28480
1824-0104
Aii>g3
lEjft-OAO*
1
1C LF 395 OP ARP
2701A
LP355H
AlUUA
1E2E-01A7
6
ICi 2 COHMUIER LHSJ9 .>PEC.
29480
I824-0547
A|0V>
lEJA-OAAT
U« J CORRUTEA LRJ39 SP«C«
2eAB0
1824-03*7
AIOU«
1E2»-0A*7
1C* g UiNRUlER LH339 SPEC.
28460
1824-03*7
AlOU?
IS2A-047I
1
1C OP AMP LOW DRIFT TOOO
07100
0P-07CJ
AiUUA
ibg6>0JA7
ILt J COHPUIER LH339 SPEC.
28480
1824-03*7
AIJI.I9
|S26-0iA7
iLt J COMPUTER LM3S9 SPEC.
28480
1824-0347
AlUUU
l»2i>-U9«
iC-gl6JtAL SR74LS174H TU IS HER
012BS
SN7*ISI 7*N
A1UUI2
462l>-i496
IC-ai6lfAC SR74LS174H IfL LS HER
012BS
SN74L Si 74N
AlOKU
1420-1496
IC-OINITAL SN7ALS17AN TIL LS HEX
01295
SN74LS174N
AiguiA
ia^0-Ui6
IC-OISITAL SH74LS41SN TU IS 3
0129S
SN74L S138H
AlUUi»
442^1196
4^-01 CITAL SN74L$174H TU LS HEX
01245
SN7*l SI 7*N
Aiauio
i020-4l9(»
IC-3lblTAL SN7ALSITAN TTL 1$ HEX
01295
SN74LS174N
Aigulf
444i>-U96
1C-31UIIAL SN7ALS1TAN TTL LS HEX
01245
SK74LS174R
Aiguib
44 26-0461
CC MC I436C OP AM
04713
RCI434C6
AIjOIV
1S20-0A71
4
IC-DI6IIAL &H7406H TTL HEX 4
04295
SN7496R
AlOMl
482(^1497
IC-3I6ITAL SNI4LS00M TU LS OUAO 2 NANO
04295
SN7*LS00N
AiOWk^
182<7-il99
IC-0I6ITAL SN7M.S0AN TIL LS HEX 1
01245
SK74LS04H
Aigg^>
1420-4420
2
IC-3lblIAl SN7ALS92N TIL LS OIY-X-12
01245
SN7*IS47N
AUU«4
4820*0474
IC-DICITAL »R7406M IfL HEX 1
01245
SN7*0AN
4418-2279
4
IC* RJ5-A0H
28400
181B-22 70
AIJU<6
0345S-S3B01
NANOPROCESSOR ASSY INCLUDES AlOfllOB*
28480
034S6-82S0I
A4>)U</
4«40-1496
iL-JiultAL SN7ALS0JH IIL LS OJAU i NANO
01295
SN7*L S03N
AlgiMA
4420-4499
<fOJ»ITAL SK7HS04N lU LS HEA 1
01245
SN74LS04N
Algu^y
U 2 i>-iivr
IC-DlallAL SN7ALS00N ITL LS OUAO 2 NANO
01245
SR74LS00N
klu/Oii
442lH44<0
U.OtCITAL sN7*LS92N TTL LS OIV-X-12
01295
SN7HS42N
Aigu>«
lA^IUE
IC-SiOirAL SH7ALST4N TU IS OUAL
01295
SR74LS74H
Aiauij
4420-44U
IC-JICITAL SR74LS74R TTL LS DUAL
01245
SN7*L S7*N
AiUUiA
1«S<HBS77
2
OPID-ISOLArOA LEO-POlO/lSU tF*50RA-RAK
2S480
1440-0577
Aigu}»
199(^0677
OPTl^ISOlATUR LEO-POlU/XSiX IF*30MA-MAX
28480
1990-0571
A4UUiA
la^oiSA
4
K V RGLIA
77014
SL2S683-2*
AiJiiiT
10 <^0299
4
IC V HCLtA
27014
LM330T-24
Aigg3«
ta<&-03B6
1
1C 7A19C V HOlTA
02237
78I5UC
A10>JA«
ll3A-0<77
4
II LH 320 V kCLIK
27014
lM320t-15
4206*ojgy
4
HcAT SINK SCI TU-220-PXb
28480
1205-0309
Aig«4
gj499-«l607
4
LABLE ASStMRLTi l.l .lINCLUOES PI)
28480
03495-61607
AlOHi
gg 469-64 wO«
1
CABLE* 40/4 OIVIUEA
28400
03455-6U0I
AlWAl
420i)-0466
4
sUCXEI-IC M-CUNI OIP-SLOH
00113
A-23-2030T
AiJVi
04 4g-046>
1
C.JTSIALt UUARU ASIB.TOObHt
28480
0410-0661
>04il-Al7A
GJlUE tPCJC-IN PL 40AAU
28480
5040-0170
All AC
11I77-BBB01
1
ASSEMBLY. REFERENCE
28487
NOT FIELD REPAIRABLE
REBUILT EXCHANGE ASSEMBLY
in77A
REPLACEMENT ASSEM8LV
AA RESISTOR A
IOR11IAPPLIESONLY
TOSiftlAL
NUMBERS leaAOOill AND ABOVE
AA REEO SWITCH AlOSI APPLIES ONLY TO SERIAL NUMBERS 1B22M)O410 AND BELOW.
AC REPLACE WITH A20 ASSEMBLY PART NIWBER 111778 FOR REPLACEMENT OR EXCHANGE.
1 1 1
8-140
Model 34SSA
Section VIII
Reference
Designation
HP Part Number
Mfr Part Number
A13
A12C1
A12C3
A12C3 Ae
A12Cft1-CR4
AIZCflS
A12Cne.CR7
Ai3c<ra
AI2CR9
A13CR1I-CR1&
AI2RI
A12R2
A12R2
A12R4
A12RS
A12R6
AI2R7. RS iA Ag
AI2R*
A12R11
AI2R12
A12R13
A12R14
AI2R1S
A12R18. RW dA AB
AI2R1B
A12R19
AI2R21
AI2R22
0346B-B6BI2
OltO-ffiX
0160-0184
0160-0167
1901 0060
1902-0777
1901-0060
1901- 0038
1902- 3139
1901-0060
1966-0247
1863- 0020
1864- 0087
1964-0079
1866- 0247
0983-1116
0883- 4326
0767-0069
0683-2739
0696 4468
0699-4202
0767-OU2
0683-1236
0683-4716
0683-2426
0683 3036
aNB-3461
0683-2736
0767-0442
0683-4336
0683-1639
0683-1236
0683- 1126
AA see NOTE ON SCHEMATIC 4.
A 8 SEE NOTE ON SCHEMATIC 4.
PC ASSEM6LV, OHM CONVE RTOR
CAPACITOR FXO lUF'-TOBSOtlDCTA
CAPACITOR FXO .038UF«-I0» 300 VOC
CAPACITOR FX04700PF«-108 200VOC
OlODE-SWITCHINC 80V 200MA 2NS 00-7
OIOOE-2NR 1N826 8.2V 6\ 00 7 PO-26W
OlODE-SMIlTCHINaBOV 200MA 2NS DO-7
OlODE-HV RECT 1KV 600MA 00-29
DIODE- ZNR 8.26V 6« DO-7 PO* 4W TC».063«
OIODE-SWITCHING BOV 200MA 2NS 00-7
TRANSISTOR-3FET DUAL N-CHAN O-MOOE TO-71
TRANSISTOR PNP SI PD-300MW PT«I60MHZ
TRANSISTOR NPN SI P0*360WW FT*7SMHZ
TRANSISTOR NPN 2N3439 Si TO-6 PO*1W
TRANSISTOR-JFET DUAL N-CHAN 0 MODE TO-71
RESISTOR no 6« 39W PC TC<-4007*600
RESISTOR 4.3K 6« 26W FC TC*-400/>700
RESISTOR 1M l» SW F TC-0>-IOO
RESISTOR 27K 6« .2SW PC TC*-400/*8a0
RESISTOR 1 13X IK 12SW F TC<«> 100
RESISTOR 887X 1% 12691 F TCH7«-100
RESISTOR lOK Ik 12691 F TC^-100
RESISTOR 12K 6« 26W PC TC— 400/»800
RESISTOR 470 Sk 26W FC TC-- 400/*6K
RESISTOR 24K 6k .26W FC TC--400/-700
RESISTOR 30K 6k 39M FC TC>-400/>800
RESISTOR 133K Ik 12W F TC~-I00
RESISTOR 27K Ek .26W FC TC--4aO/*900
RESISTOR 10K Ik 126W F TC^-100
RESISTOR 43K 5k 26W FC TC«-4a0/>800
RESISTOR 15K 6k 2S9I FC TC— 400/«600
RESISTOR 12K 6k .2691 FC TC*-400/«800
RESISTOR I.IK 6k .26W FC TC--400/»700
03466-66612
I900106X0060A2
0160-0164
0160-0167
1901 0060
1N826
1901-0060
1901-0036
SZ 10939 168
1901-0060
1856-0247
1963-0020
1664 0087
2N3439
1866-0247
cams
CB4326
MF7C1/2-TO-I004 F
CB273S
C4-I/B-T0-I13I F
C4-I/8-T0 8871- F
C4 1/8 TO-1002 F
CBI236
C84716
CB2426
CB3036
C4-1/8-T0 1333-F
C82736
C4-1/8-TO-I002 F
C84335
C81636
CBI236
CB1126
8-141
Section VIII
Model 3455A
Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
1
Ht8ISIUt lOoK 2* IH no TC-04-200
US02
•032
tiethMTt
1
rHAMSFQRH^At POLS£
28480
9100-0479
lSif>•0^ki
2
lb LH JOli UP AMP
27014
CH9014M
kUui
U iA 301A OP AHP
27014
LH30IAN
Ati
1
P.C. A3&Cn9Lt» AC CQHVEKrCA
204A0
03455-04S23
Altti
oitu-mt
4
CAPACII0A-7X0 iOPf JOOoVOC MICA
20410
0100-2199
i>i«O*440A
1
CAPACIIUD-PXD .ISUP 4-108 lOMVOC POLYP
20400
0160-4404
AiiCi
0i«0*4«0i
i
CAP1C1T08-PXD .UlUF 4-108 lOOaVOC PULTP
28488
0140-4401
*liC«
aiAO-A4a2
1
CAPACITOA-FXD mlUf *-104 iOOtfVOC PUL7P
20400
OUO-4402
AliL>
()4MH2AV9
CAPAUTUA-FXD 3QPF iOOvVOC H1CA
20400
0100-2199
AiJL«
0t4»-«39«
1
CAPAClfOMFXO .0A2UF ♦-tOl 200VVI>C POITP
20400
016>^4390
«t)ki
CAPXCilUR-PxO .U62UP 4-108 200OV0C POLYP
28480
OUO-4390
AULA
inAt^ALOl
CAPAClfOA-fAO •OlOP ^40t 4U0HWC POLYP
26488
0100-4401
A|4tV
inbO-A^iJl
C4P4CIIUA-rxO .OIUF 4-108 lOMVOC POLYP
28488
0100-4401
AliCli
CAPACIIUA-FXC 33^»-iVt WVX 7A
34200
IS00334X90I062
AiiCiA
01«>-049r
CAPACIIOA-PIO 2.20P«-lOt 20VOC lA
S4209
1000229X9020A2
AiiMi
uido-i;j>
CaPACIYUA-PAO .22gf»-iat J3V0C ta
S4209
1S00224X9039A2
AiiLlL
‘)lA^^i99
L4P4LIIOX-PXO 13PP 4-88 JOObVOC MILA
26460
0140-2199
«liU>
out-o*»
1
CAPACITOA-V TRfW-AU 1.7/14.1PF 330V
74970
109-305-I29
A13L10
i
CAPLCITOR-rXO >PF 4-108 800IVOC N1C4
26480
0140-0743
A13C17
OieO-0383
1
CAPACIYO8-FX0 620PF *-6« 30OWVDC MICA
38480
0160-0363
A13C1S
0180-1746
1
CAPACITOn-PXO I8UF4-I0* 20V0C TA
86368
1600166X902062
AI3C19
0I6O-0848
2
CAPACITOR-FXO 346PF 4-1% SOOWVOC PONC
28480
0180-3849
AI3C21
0180-0083
CAPACITOR-FXD OIUF •OO-TOV 100WVOC CEA
38460
0100-0063
A19C22
0180-0187
CAPAaTOR-PXO 2MP4-10% 20VOC TA
66289
I80D338X9030A3
A13C23
0160-3134
2
CAPACITOR-PXD 01UP f'O* lOOWVDC CER
38480
0160--91S4
AI3C24
0180-0187
CAPACITOR-FXO 2.2UF4-10* 20VOC TA
56200
1SOD228X9030A2
A13C28 *A
0160-0378
CAPACiTOR-FXO 27PF *-6% SOOVDC MICA
38480
0160-01B1
0160-2180
CAPACITOR-FXO 33PF «-S% 300WVOC MICA
38480
0160-3180
0140-0190
CAPACITOR-FXD30PF SOOWVOC MICA
26480
0140-0190
AI3C26
0160-3848
2
CAPACIT0R-PX038PF «- 1% SOOWVOC MICA
38480
0180-38*6
A13C37
0180-0086
1
CAPACITOR-FXO .06UF *80 - 30% 100WVOCCER
28480
0)80-0086
AUUO
CAPACITOA-PXO 30PF 304HVK HICA
2040D
0160^2199
AlJi^A
4
CAPACIIOK-PXQ li>PF «— It IJOOMVAC POAC
20400
0160-3970
Alien
l,»|«0-3977
1
CAPXCITUX-FXO 970PF 4-lx lOOaVOC PORC
20409
0140-3977
AliLi^
0144-0202
1
C4PACIiaA-FXD 13PF «-3| 30UMV0C PICA
72134
ON 1 SC 1 S OJ OS 00 V VU A
AlJkii
0i«O->V30
i
CAPACITOH-f XU lUPF 2&i>0«VK PQAC
20400
0100-3930
AllLJ*
J1 21-0434
2
CAP4CII0A-V YAMA'AJK 2«4/2483PF 330V
74970
189-S09-12S
AULi^
JleO-3d81
2
CAPACIfOA-f XO .lUF 4-204 4J3VV0C HCY
FA002
00710440
AliLHl
1902-^447
3
DIOSE-MR 23Y 88 00-7 PO«.*l< IC*4.0738
04713
SZ 10939-249
AlSLAi
1904-04)3
2
blOJE-GCN PAP leOV 200AA UU-7
20400
1901-0033
A13C«i
1901-0040
24
dlOOE-MnCHlItb 30Y iOlU 2N8 00-38
21410
1901-0040
AIMA
I9C1-0433
UlOuE-GEH PKP l»OV 2UUKX tX>-7
28460
1901-0033
AliCR>
I90t-081a
9
0|U0C-3CHaHKY
20400
1901-0518
AliCilA
49Ci*0UU
OIDOe-lCHOttXY
26460
1901-0818
AI4b4l
l9U*3i20
4
0IUUE-2NR T.32V 88 OO-I PU-.4V tC*4.0*88
04713
82 10939-143
AliUiA
lObl-OuM
DIOOe-SPiTCMiNC 30V 3UHA 2N3 00-33
20400
1901-0040
AIACk^
19bl-Og4g
UIOUE-EpIKHIM 30V 80RA 2N8 UO-38
20400
1901-0040
AliCrt|4
I9C1-U<<*0
0I0UE-8H1TCKINC. lUV 80RL 2MS 00-38
20400
19U1-0040
AUCHt^
l9i;l-0<J40
OlUOi-3»JYCHlNO 30V 90HA 2Nb 0D-3S
20400
1901-0040
AiiCHlJ
lVQ2-34<jA
2
UI30E-2NR 4.78V 28 00-7 P|1*.4V IC— .0191
04713
82 10939-99
AijC«4«
l9C^-iU«4
DI3DE-MR 4.T8V 28 00-7 PU«.44 IC«'.0198
04711
SZ 10939-90
A4 3Ci«4»
1901-UU9U
UI33E-8kltCHlN0 30V SOU 2N8 JO-38
20400
1901-0040
AliCHio
I90l-0v<»0
umUE-MlIbHIAC 3UV SWR* 2Ni UU-3S
20400
1901-0040
AlJCRi/
I9CI-OV47
2
UIJOE-EWITlHIMC 20V 7SU IONS
20400
1901-0047
AlACAt*
I901-UJ47
OlUU(-Sy|YCHblC 2UV 7VNA iJNi
20400
1901-0047
AlAUi#
I9CI-0O4O
OlOIE-SHIILHlNb 3UV 80X4 2M8 00-38
28480
1901-0040
AliCK4l
|901*0O4J
UlUOe-^ViTCnlNt* 3UV VOHA 2N3 DO-33
20400
1901-0040
AUU2^
I901-0w4g
UUDE-SMirCMlM. 3UV SOU «NS UU-3S
21480
1901-0040
AiJAl
J4VV0883
•IIL4T-HEE0 lA 130H* lUOOViK SVOC-COIl
20400
0490-0683
AlilU
0*90-0683
HLLAY-ACEO lA UOMA iOOUVX SvK-CUjL
26460
0490-0883
AliAi
0490>0wbi
RrlLV-RttU 14 IJORX lOJOVOb SvOb-LOIl
20400
0490-0O03
AUUl
iOH-oon
rKAN&UYOK HPn si PU*3jOAii F7«200AH2
20400
1054-0071
A link
i4M-0071
UAASISTOA NPn SJ PO-iOOAM Fr«200MH|
26460
1684-0071
Aijyi
40 SV03A«»
IH498I8T0H 3-Ftl 2M3V2 N-CHAi< O-HOOE
04713
2N4392
Aliy4
10t>-U^Ao
tAANSUlOK J-fir 21*4392 N-CHAN iP-HCWE
04713
2N43V2
AUW»
4A)9-0i9»
lAANSUUlA 2-Ftr 2N4392 9-CHAV O-HUOC
04711
2N4393
AlJLL
l«8>-OJ4b
ULHSISIUR J-Ftt 2tt43V2 H-bHA^< 0-MUDE
04713
3R4393
Aiiwr
1«;4- 0^91
2
rKAkSUTOR NPN 3l TU-16 Pi>*34UNa
20400
16 34- 0381
AiJw4
laii-Ouiu
UkVSIStOR PV 11 10-18 PUOsURk
20400
I6S3-00I0
Aiiyv
loS3-0«20
TMANSJSrOA J^PCf 2M43V1 H-CHAN O-HOJE
04713
2N4391
A4>g44
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fMASISTQfi KPN SI Tl>-IA p4^«3vl>KM
20400
1684-0331
AA S9ENOTEONSCH
EMATIC3
-
8-142
Model 34SSA
Section VIll
Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
ISM-UwitS
1444$! &IUH PNK 3l fti-U Pl>«3^vM«
2«4»9
lSSS-0013
J
t»»*-oj71
lASNSISIUK nPN SI P»>3<WIU rr-23«A>u
2ak«0
itSA-oo ri
rK4*«$UfO«l AH^tl dMi-fl N«h.HA4« fr*HOUC
04745
2N4394
*&iyi9
I«s>-0»y2
1
liUhSISIOA-JKI IIU*L A-<HA'< U-IUOi SI
|7»54
E*2I
*i>H4
a4«>-&i4>
hlSisiw sijK St .tsii »b r;>-«oo/*909
9U24
casiAS
*1J>U
UAAj-^4iS
4
teSlSfOA 22K >4 »Zb^ FC IC«*40D/*«0C
0II2I
C6223S
MSlStlK St .3>l FC fk*-*0«/*a00
04424
C92259
&liA4
y«Wi->Ob
2
•tSISTOR 3ttK It .12Sa F <.•<l•-IOI>
RISiT
CRE-SS-lf r-1
KtSlSIiM 34AH l\ *42»4 F TC-U4-400
9I6S7
CHF-SVl, I-l
07)7-y^.»3
A«3l4l4Ai 40tfA 4( * K«0«*400
2ASk>
C*-l/*-I0-l0OJ-F
hum
UTJT-<Uru
1
KL^ISia* 2SSK IS .I2SH f lt>»«-10l>
2tSAS
CVl/O-fO-Em-F
Ali«»
kLSISiUt 22K >t .tSH Ft tL*-«0<l/*IOO
01121
CBEZiS
Ali««
y«*«i-409>
lUblSlQR 40A »A .2>M FL f4**4a0/»70y
01441
ceiois
yA»i«>i49
iuSISIUM SIdK St .2sa Fb IL•-40l)/»«03
J112I
casiAS
^iC4^4A.|6
3
atSISIOH-rilMK SOK Id* 1 SiUE-AOJ ir-TSM
S2A*r
JOOAP-I-SO)
AliMia
^igw«i>j9
4
Kw3l3l(K'74AA it. tOS b 47-ffU8
>279?
5005P-1-202
JAM-44»7
1
HlSISIW l.dSK IX .l2Sn F U-dF-lUO
24545
C*-l/a-l0-l05l-F
A&jMv
Ac^ISfUH ItM •«»« fC fi.*>4O0/»7OO
04124
caiois
Ai JAi*
or»r-u«oi
MclISIUi lUU It .USM F IL*a*-lJd
24545
C4*l/5-Y9*101*F
A1JH17
i
KtalSlUl Fit It .l2Sa F IL>0*-i00
03 351
PAE55*4/5«r0*4120*F
AUKtj
M60WU4»
d
K.slsn*! 2UUF St .2>a Fk 1C— «<M/*S09
01121
CS20AS
Aii«14
i
Kl$1>IQA si 54 .2Sll ft fC*-450/«Sd0
01121
CSSIOS
AijiUl
y7S7*>iH^i
1
IwSItlUK IW.IK It .l2Sa F TC-dF-lOU
24545
CA-l/a- IJ-SOU-F
AiilU4
yA9A*4<»d4i
4
dkSiSIUK 2«.TK It .KsM F lk«dt-ldd
24945
c*-i/a-i3-2»r2-F
AiilUl
3
MkSI Stdk'IRMR SA Id* C SiM-AdJ il-IHN
>2997
3006P*4*902
AliHih
U»IL>-2w2»
RCSISi« 2K St .2Sh FC TC--40d/*r00
01121
CB202S
Ai«H^>
0A9»-42l>
3
KttlSIiMStK M IP/0 MATCHED SET ATSje.t})
25409
0595*0249
Ai>M^«
RcjISIUA 2K M .254 Ft 1C— 400/47UQ
94424
CS202S
Ai>H^7
0A6>-tvtS
4uy S4 ft 1C«*4yO/»500
04121
C54019
AiAfUS
1
ArilSilX 44i> a •2>4 Ft K**400/*600
04424
C52419
AiilU^
KtSiSTW 22K 31 .2311 FC IC--«d(l/>*UO
01121
C8223S
AiJMii
ttQa»-u»
K«>isiun >4 •2>4 Ft 7t*'4yO/47M
04121
C54059
K 3ISIUH 3iet S« .tSa fk lk—FUU/*Wd
94424
C59149
U747>tK42
lOK *14>4 F rk.«y»-laO
24545
C4-4/5*f0*1002*F
R.SISIUk IdA S^ .tSH FC tk— a90/*aU0
01121
CKU)S
AiilO>
Ao^lStOk 3K b« •4>b FC 7C— 4yt>/«700
01124
C0302S
Ai»H9o
2 luK^dOv
KCSISIUk-IRn« 3UK Igt C sluc-AUJ 17-lkN
J2»»T
>005P-1'503
Alai^j?
96A3-474b
Ae^lblUK 47t 94 •2>t Ft fC»*400/4400
04421
casTis
AiAAiA
j4lW-b«|b
RL31SIUR 487K £\ (P/0 MATCHED SET R2S. 38,t3)
2«4e9
0595-5219
AAJHjy
J4 W-4«02
A.5I34LW A.«7* IS mld>4 F rc.«0»-40a
24545
ck-i«-io-ea7i-F
AAAA%i
y« 9 o*4^0a
RcSIalUR d.«?K i4 -ItSk F Ik-JF-IOQ
24945
c*-i/«-T0-ae7i-F
A1^A«£
k)0«»*4«a2
K.515I0A A*57ai |< »Ubm ^ fC-Q^-iOO
2454 5
C4-1/6- T0-B5I4-F
A49Mi
K'.SISIOR 2M 51tlP/OMATCHEOSETn2S.3e.*3)
26450
0592*5219
AiiMA
y^W-osiiA
4
KI.41SJQA 30.7K S% (F/0 MATCHED SET na. A45)
264b0
0695-8215
AIJUA)
l)s«»- •.>(!>
R<SISlUH 2M M IP/0 UATCHEO SET R4t, RtS)
204B9
0o95-52l5
d
K,;alSIUH-ta>lH 3IM Idt k >lJC-AbJ iT'IRn
S2F«r
SOOkP-l-SOt
Atiut
i
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27dlS
LA204AH
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27014
IH201A4
Ai>Ua
L«10-u>>J
1
lw« FiHl UNk CHIP
25460
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Ai)y4
1. CM 2dlA UP ANP
27944
IH204AH
*iiV9
l•2»-blu<
U HA 2625 UP AHP
26450
IBta-0109
AIaUo
l»^-l>*ft
If^UlfAL SN7«VtA fft HbA 1
0120S
SN7A0PS
I6gi>*09is
1
&tAMPl«p, 0AS *020» THt
IA16S
uau
4040-UMA
1
eAYhAcTUR«>PC aU »U PM.TC •042-yH*Y>«N3
25459
t040-0lk«
AiA
4
P... SSSEHsLT. «d kUNVtKItR
2a«so
03499-55914
Al^l
yiS4Hy«M»4
3
k-PAblTUK-FXd .lUF ••d-^U> IddaFUk CER
25459
Qiso-ooat
Al*b«
CI*d-A.«J
tAPAtlfOMFlJ *g4«yf ••lu« 4UU4VJW PJiTP
22469
0150-4)96
AiACi
Ul4^Ui44
4
CAPAUfaK-FAD 4lOPF »>>4 3304V1X. MJCA
72135
OH4SF4riJ9JOOHV4CR
Ai«CA
UiM-Uw4.4
tA«PAt IfUH-FAg «4UF lUObVOt tEA
25459
0190- 0054
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yR.PACIfOH-FXO »4UF *4.}^d4m i^lUtVOC tEA
25459
0490-0054
«>»<.<■
u14<^24«4
CAPAtl fCA-FxU luUPf «-94 »3uiaV«iC HltA
2 a*«o
0160-2204
AlAuti
14 w 9*>7
OlJga-lllA 4iV >« JU*7 PU«.«M fC**«U75t
o*m
U 109J9-269
AI4vK«
IVkl- CD76
OIJJE-GENPRP XV EOMADOat
25449
1O01-037S
Al^^iO
14CI-Vv4y
UJwi>t-$«ltCn<NU iUV SOAA 4N5 OU-5>
25410
4901-0949
A14bPt4
IVCi-y>la
g|U«rfc~lkN PaP ^»V soma OU-7
25460
4901-0375
Al«U>
14U|*Uj7u
Ul JOE-CIN P4P >>V >UHA «4U*7
26450
l«01-03 7k
ai«c>is ‘A
l«i:i-0376
dl Jkt -GEN PRP 36V SOMA DO X
25459
1001-0376
AI4UA7
ibcj-j<ir
dIJdt-tNH /JV 3. Uti-I PU^.th Ik—. out
0«71)
42 l09iV-269
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UlJJt'iBlICniliC >OV 50H* e*«4 UO«3>
25459
4904-0945
AI4CK4
lVCI*Vv4g
0iO9t-4M|TC:ilHU iOV 9JAA «N5 (H>-35
2545U
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Ai^VK4<^
ivCl'^UwAJ
Oljgb*5iil7LHlSC 30V 50HA «4» 00*.»5
26450
49g4-Q940
AA SERIAL NU
MBERSIG2AQ623IAN
DAaOVC h
OTE (dSION SCHEMATIC S.
8-143
Section VIII
Model 3455A
Reference
Designation
HP Part
Number
Qty
Description
AUUil
i«C4-o>ie
DIODE- SC HOf lev
lVOl-0040
OiSOE-SBlTCHINC 309 30NA 2NS 00-35
AI4WA
1933-0020
T96NSISTOR FNF SI FO-IOOHH FT-130HH2
l»S3-0ul9
1
UANSisroft SI n>-ia
AIM
fuaNSlSIOA J-fEI 2N9391 N-CHAN O-HOOE
*1404
1633-0033
1
liONStSTOR J-FEI N-CHAH O-MUOC 10-72 Si
AI40S
199V CBAB
1
IRANSiSIOK-JFE7 0<1AL M-CHAN O-NOOE Ta7l
*1404
r«ANSISn» FRF SI FD-SOOM FI-I30NH2
919K1 AB
06 93-I03E
1
AlStSTOR *0K 3E ,23H F( f(•-9002*700
«l4lt^
04*4-^024
RESISTOH 29 3< .239 F( tC— 900/*700
Ai4«*
0696-3133
■feSISfOR 4.44K 11 •i2in f fC*D4-lD0
AI4H4
2
RiSISIOR 109 .11 .1239 F99 lOOW
*14«>
0 7»7>iHU
i
RlSlSIOl 9.329 IS .1239 F IC•U9-IOO
AI4K4
07S7-»0*«0
ibSJSrOl |A M •1294 F fC«94-100
Ai4M?
a4«H>/24
1
RISISIOR 6.999 IS .1239 F IC«0*-100
A14MA
D7«7«0440
1
AtSISm 7.5R 11 .USA F fC*04-100
A14A4
0747-0442
1
RlSlSrUR 739 IS .1239 F t(>a»-100
A14AU
07 i7- 04 JO
i
Risism 2.219 IS .1239 F I(«09-I00
A44MU
04 44*i»ii
1 1
RtSlSIOS 663 It .1239 F TL-O'-lOO
Ai4Aid
RESISIOR 39 3S .239 F( l(— 9002*700
A14Hii«
04tti-224J
1 1
ALSlSrot 22M 51 .250 FC fb«-VDD2« 1200
A44A14
07S7-O442
ftkSISm lOK le .1256 f 7(.*0»-l00
Al4Ai>
0atl-3ul7
1
RESISIOR 19.89 IS .1239 F99 r(-0*-3
A14A44
07S7-O44I
1
AtSlSrCK a.25« It •I25K F fC-QJ-lOO
AiertU
0 747-0449
47$JS7i» loot It •125a F rC«0«-100
A19K19 AB
07 37-0273
RESiSKS 30)9 IS .1239 f TC*0*-tOO
619K19 AB
raMH-AAAO
1
RtSIStOK B« it .1239 F IL>0*-100
A19IU0 AB
oe»e-32»
KtSJalOA a.40Kl4 .U54 F 7c«04-l00
Ai^iUi
Odll-2>77
AeSlSfGF lOR •11 •125a P«« TC«0»-2
AlAiUi
0649-Ji»>
RESIStW 4«44K It •125a F Tk>0f-100
Al4>Ui
04a 43-4215
i
USISIUK «20 5t •25H FC TC«-40O/»»0O
A19K29 AB
11683- 103B
A^SJSIOH 1DK 51 .254 Fb 7C**400/«700
A19K23 AB
0443- 1036
RcSISlOR )0K 3t .239 FL TC*-9002*70<)
A141U6
0490-3440
2
RESISTOR 9699 IS .1239 F T(«0*-100
*I4Hd/
049d-0<»49
2
KqSISIOI 1.98M .IS .239 F IC>l>*-23
A14IU0
<1693-2733
RESISrtR 279 3( .239 F( l(— 9002*600
Al^lUi
04«i- JV25
1
RESISIOR 3.99 39 .239 F( K— 9002*700
*14MJ0
049^0440
RcsISIU) I.28H .11 .239 F T(*0*-23
A14H41
94 9a- 3240
RESISIOR *699 IS .I23r F I(*0*-I00
AlltllA
049A-3409
J
ReSI&KA 40.2R IS *1254 F fC«04-100
A14K4A
0490-3499
9£$ISI0R 90.29 IS .1239 F U*0*-100
414^94
O4»3-102>
1
Rl-SISKM 19 3S .239 FL IL*-900/*6UO
A144U9
bi494- J499
RcsISlOH 90.29 IS .I23> F |L*0*-IOO
*i4M4o
0693-2933
1
tlSI^rOR 242 51 .25W FC rC*-400/4400
A14Ai7
04IK3-Ivi5
RlStSlOR 109 3i .239 FL 1(— 9002*700
*l4Hi>
04*J-JU4>
i
JU5I5IUF JOJK 5* •25H FC )i.**AD0/*4Da
*44«uy
U4l0-3«i74
Ac:»IWQR 5K 51 .254 FC 1C*-400/»700
0 7 37-0992
Rr5l5l(M ItM IS •UMi f
Ai4«4t
07 57-0442
RtSISlIK 109 11 .1239 F IL*U*-100
*14«41
044i-47i>
i
RLSUIOR *79 31 ..39 Fb IL— 90 02 * 600
414H4J
0 6 83- 2U33
201 5i .254 1C lb»*400/4A0i>
A14a44 Aa
0 6 83- 2086
3
HCtl&IOl 7M 54 .25a Ft fC*-tfOJ/»l lUJ
*44«4»
0»i3- L04V
RbsISIOR lOM 38 .239 FC T<.>-9J02*1100
*14A4»
<1693-1063
■e^l&ItJl IJl »C >254 Fb K«-500/»lli>0
A14H4/
36 96-9973
t
Hl, 5I5IW 9.741 11 •U5A F fb«UF-100
A14A44
0 7 3T-0907
1
RlSISIOl >829 II .1239 F IL>0*-I00
«l4gi
I9C4-007J
2
iindfc-AlRAT
A&4M
49C^0o/0
Dlggi-AIIUT
AI4Ui
l»<6-047l
d
IL OF AMR LOW-DRIFT TO-W
At 404
|I»a4-Q40V
1. AO 3I6J OF ANF
A1404
l««0-02o3
i
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A14U4
1
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>04bH4«4J
2
CUlACTUl* F.(.« bbAiM
>bCBH9u4J
4
FINiF.C. 9<I-HJ LAlRALlo.
Mfr Part Number
iMi-stia
I90l>03*0
lt»3-0020
2N9)«1
l•»V003)
iM»-n4e
CS10S
Clidlf
U7*-l/l6-k-1002*J
c^i/a*io-4Wi*F
C«*l/»>ro>tQOt*F
C*-t/«-T0*r»O2>F
Ck'i/a* ro>22ii>F
ro-t»$ii*F
caioj*
Ct22»t
tJ»0-l/*>C-19«2-F
C4-l/a- IJ-aJil-F
C*-Ua-fB-lOJJ-F
c*-l/a- 19-3011 -f
C*-I7a-I0-6«R -f
C4-i/a-ii>-a«i -F
12T4-l/26-»-lJ0Z-a
C4-l/a- 10-4641-F
caazis
CB103S
C81033
CNF-»$-l. I-i
HF »2C-I
CajTjS
(9392$
■F 52C-I
(9F-S5-1. r-i
C*-l/»-l9-»922-F
C4-l/a-fO-4022-F
Cai02>
c*-i/a- ro-4022-F
(92933
(ai033
(83093
(93023
(9-i/a-fg-i032-F
C9-l/a-I3-l002-F
(99733
(92033
CB2069
C9IU93
(91063
F9(33-l/a-r0-17el-F
(9-l29-tJ-1933-F
1906-03 70
1406-0070
0P-07CJ
aU316J
79l((009
>090- u9«>
3000-9091
6A SEE NOTE ON SCHEMATIC 6.
AB SERIAL NUMBERS 1B22AOS731 ANO ABOVE SEE NOTE ON SCHEMATICS.
8-144
Model 34S5A
Section VIII
Raploceobl* Porti
Reference
Designation
HP Part Number
Qty
Description
Mfr
Code
Mfr Part Number
A1ft
OMH-SSSn
1
PC ASS6M61V. AC RMS
284*0
034SS-86SIB
A1SC1
ono-0121
8
CAPACITOR-FXO .lUP nO-SOI tOIBVDC CEN
284«
0160-0121
A16Ca
0I20-00S6
1
CAPACITOS-FXO 027 UF 300V
284M
0170-0068
AIK)
0I7O-0O3S
1
CAPACITOR-FXD .77 UF 200V
2*460
0170-0038
A16CA
ono-3os4
1
CAPACITOR-FXO .lUF '-lOk 100WVDC CER
78460
0160-3004
A16C5
0n0*3l34
CAPACiTOR-FXO OHX «-10« fOOWVOC CfR
28460
0180-31)4
AIKS
ono-20X
1
CAFACITOR-PXD 7B0PF •'-6% 300WVDC MICA
264W
0180-20M
A16C7
OIBO-23W
CAPACITOR'FXO 100PF *-8% 300WVDC MICA
2*460
ono-2204
Aisca
OISO-OIS3
CAFACITDR-FXO .033 UF 30OV
28460
0100-0183
AIBCS
oiao-aen
1
CAFACITOR-FXO 37 UF *-IO« tOFIVK MET
284M
0160-3886
Aiftcn
OISO-22SA
CAFACITOR-FXD 30FF •-6S 500WVOC CER
28460
0160-27*4
AIK>2
0140 -one
CAFACITOR-FXD 300PF <-B« SOOIWOC MICA
72IM
OM18F2O1JO30OWV1C*
A1KI3
0160-2717
CAPACITOR-FXD 10PF *-8« 900WVOC C6R
264K
0160-2267
AIKlfClS
oieo-02si
CAFACITOR-FXD 1UF »-IOS 38VOC TA
66786
1B00106X8036A2
AIK16
0160-2297
CAFACITOR-FXO 10FF i-l* 600WVOC CER
2*400
0160-2787
AIKI7-IB.C2I
01 50-01 2t
CAFACITOR-FXO -1UF n0-30» 60WVDC CER
264H
0160-0171
Alien'
0160-2217
PAOOIMG LIST
CAPACITOR-FXO 10PF «.6% 800WVDC
28480
0160-2M7
0I6O-22M
CAPACITOR-FXO I2PF «.8% SOOWVDC
2S4B0
0160-2268
0100-7261
CAPACITOR-FXO 18PF »-6% eOOtWDC
26480
0180-2261
AIK23.C}*
ono-0121
CAFACITOR-FXO .lUF •60-306 60WVDC CER
264«
0160-0121
A16CM
0160-30*
CAPACITOR-FXO 346PF 600WVOC PORC
28460
0100-30*
AIKM
0160-0171
CAPACITOR-FXO 1UF «*0-7(K 60WVDC C6R
28460
0160-0121
A16C37
0160-3046
C^ACITOR-FXO 36PF *-16 800WVOC PORC
28480
OnO-3846
AIK3S
0160-0121
CAPACrTOR-fXO .1UF *60-706 90WVDC C6R
28480
0150-0121
Alien, ex
0160-4460
3
CAPACITOR. FXD 10PF 100V
28480
0160-4480
AIK)!
016^ 3046
1
CAPACITOR-FXD 970PF *-1% lOOWVDC PORC
28460
01B0-3B*
AIK32
0160-7700
CAPACITOR-FXD 43PF *-8% 300WVOC
28460
0160-2200
AIK33 AP
Ono-MM
CAFACITOR-FXO nUF .-tOK 400VOC
2B4M
0160-3886
AIKM
0I2I-O4M
CAPACITOR-V TRMR-AIR 74/24 8PF 380V
74*70
160-608-126
AIKM
0I4O-01B3
1
CAFACITOR-FXO 82FF >-$« 300WVOC MICA
72136
OM 1 6E820J0300WV 1 C R
A1K36^ 4a
0160-2066
3
CAFACITOR-FXO OIUF n0-?0» lOOVDC CER
26480
0180-2066
A1KA0 AJ
0160-0126
t
CAFACITOR-FXD 2.2UF .-304 600VOCCER
284M
0160-0128
AIKS1. 2.)
1M1-00«0
DIODE-SWITCHING 30V SOMA 3NS 00-36
28480
IBOI-00*
A16CM. B
1601-0616
OIOOE*SCHOTT<Y
28460
1801-0616
A16CA6
1B0t-<XM0
1
OIOOE-SWITCH1MG30V 80WA7NS DO-38
28480
1*01-0040
A1BCA7
1001-0660
2
DIODE. GEN PRP 30V 36MA TO- 72
28460
1801-0588
A1KAS. CRB
na2-w73
OIOM-ZNR 4.32V 6K 00-7 FM4WTC— 036«
04713
SZ 10838-77
A1KR1I-CRI3
1901-0040
01006-SWITCHING 30V SOMA 2NS 00-36
264*0
1801-00*
A1BK1.K3 AA
0460-0683
RCLAV.REED 1A 100MA lOOOVOC 8VDC-COIL
28480
0480-0083
A16K7. K4
046&-0683
RELAV-REED 1A 100MA 10QOVOC 8 VDC-COIL
28480
0400-0683
Altai
1864-0071
TRANSISTOR NPN SI FD-30QMW PT*200MHZ
28480
1684-0071
AIKU-OA
1866-0420
TRANSISTOR .l-FET 2N436I N-CHAN O-MOOE
04713
7N4361
AIIGS
1686-0063
1
TRANSISTOR 7-FET N-CHAN O-MOOE SI
2*460
1888-0062
Alios
1164-0071
TRANSISTOR NFN 01 FO*300MW FT.200MHI
284M
1884-0071
AIK1>
1163-0020
TRANSISTOR FNF SI F1>300WW FT-IIOMHl
28480
1863-0020
Altos
1166-0420
TRANSISTOR ^FET 7N4361 N-CHAN D-MODE
04713
2N4301
Altos. 011
1864-0763
3
TRANSISTOR. A0618
28480
1864-0763
Allot:
1693-0030
TRANSISTOR PNP $1 Pp*300MW FT-160MHZ
28480
1863-0020
AII013
1664-0071
TRANSISTOR NPN SI PO-30CMW FT»200MHZ
28480
1834-0071
A1IQ14
IB63-OOIB
1
TRANSISTOR FNF 2N*17 SI F0400MW
07263
7N4017
Alton
1864-0316
1
TRANSISTOR NFN SI FO*360MW FT.300MHZ
04713
sP5 3en
AII0I8
1684 0071
TRANSISTOR NFN SI FO-300MW FT«200MHZ
26480
1334-0071
AIBQI7
1K3-0030
TRANSISTOR FNF SI FO>300MW FT*1B0HHZ
28480
1663-0070
Alton
1866-0081
1
TRANSISTOR 7-FET 2N62* N-CHAN O-MOOE Si
01286
7N&248
Alton. 020
1866-0430
TRANSISTOR i-FET 2N4361 N-CHAN O-MOOE
04713
2N4301
AIBAt
0603-1038
RESISTOR 10K 614 .2SW FC TC*-400/'7M
0II2I
CB1036
A1BPI2
06^-7238
R65ISTOR 22K 6% .26W FC TC--400/nOO
01121
CB223t
AIBN3
06*3-6148
RESISTOR 6I0K S« 2SW FC TC*-600/>600
01121
CB8148
AIIM
06*3-2738
RESISTOR 22K 614 MW FC K--400/n00
01171
ca723t
A1tM
06*3-8146
RESISTOR 810X S« MW FC TC*-800/nOO
01171
C831*
AltM*
OaOt-4470
PADDING LIST
RESISTOR 696K 1% .178W F
24846
C4-1^ -70-6601 -F
0787-0444
RESISTOR I21K l« 12SW F
246*
C4-1/8-T0-1212-F
0086-4308
RESISTOR I6.8K 1« I26W F
246*
C4-1/8-TD-1682-F
A1SA7
0767-04*
1
RESISTOR 20K l« .I2SW F TC*0<- 100
03292
C4-1/B-T0-8*R-F
AlfiAB
0066- *83
1
RESISTOR 160K 1% 128W F TC*0*-?8
07716
CEA-883-N330
AW*
06**- 3382
1
RESISTOR 402 l« I2SW F TC*0«- 100
24848
C4-l/a-T0-40n-F
A1SA11
0«S-3n8
1
RESISTOR MIX 1« I26W F TC^-1X
246*
C4-1/8-T0-28I2-F
A1IA17
06*3- 7466
»
RESISTOR 2.4M S« 2SW FC TC--600/*1l»
01121
C824K
AHA13
0*6*- 3466
1
RESISTOR 287K 1% 126W F TC-M-100
24846
C4-1/B-T0-2873-F
AUK14
0683-1036
RESISTOR lOK t« 26W FC TC •-400/'700
01121
C81036
AiBRn
0663-n3B
RESISTOR 22K 6« 2tW FC TC*-400/n00
01 121
C87238
Attitn
3100-3161
RESISTOR TRMR 20K 10% C SIDE-AM 17-TRN
32887
3006P- 1-703
A1SfM7 Ac
3100-3066
RESISTOR-TRUR 6K 10% C SiDE-ADi 17-TRN
037*
SOOtF- 1-302
AIIRIB Al. an
0666 PM
RESISTOR 732KI% I2SW F TCW>«- 100
03282
MCKI/t-TO 7323-F
A16A1I
0787-0417
RESISTOR S62 1% 12SW F TC*<-IOO
24846
C4-l/8-T0-t82R-F
06C3-1646
FAOOING LIST
RESISTOR nOK 6% 2SW FC
01121
C81648
0683-33*
RESISTOR 220K 6% 2SW FC
01121
C32246
06*3-7446
RESISTOR 240K 6% 26W FC
01121
C824*
06*3-3046
RESISTOR 300K 6% 26W FC
01121
C830*
0063-3646
RESISTOR MOK B% MW FC
01131
C83B*
0*63-8146
RESISTOR S10K 6% 26W FC
01121
CBtl*
06*3-7646
RESISTOR 7SOK 6% 2SW PC
01121
CB734t
0683-1666
RESISTOR 1.SM 6% 26W FC
01121
C61868
Aittu:
07I7-040T
1
FIE&ISTO* 100 t% 128W F TC-0*-100
248*
C4-t/8-TO-100R-F
AA SEEN0TE0NKHEMATIC3.
AC SEENOTEONKHEMATIC3.
Aj SEE MOTE ON SCHEMATIC 3.
AL.AN SEE NOTE ON SCHEMATIC 3.
AP SEENOTEON$CHEMATIC3.
8-145
Section VIII
Model 3455A
RapioceabI* Ports
Reference
Designation
HP Part Number
Qty
Description
Mfr
Code
Mfr Part Number
Ac
06S3-1MS
RESISTOR I00KS6 3SW FC TC*-400/*600
01B07
C8I04S
AIBA24 Ac
0683- 323S
RESISTOR 23K S% WM FC TC*-400/»900
01121
C8»3S
A1»R»
0696- Ton
3
RESISTOR lOOK 1% .I3SW F TC*Or-2S
00202
NEU
AISR3S
ae96-44n
RESISTOR I67K 1« ITSW F TC^-IOO
34S48
C4-1/8-TO-tt71-F
A1«R27
0M-a27S
RESISTOR 4.00K 1« 125W F TC-0*-100
24S4S
C4- I/6-T0-4981-O
A18R»
3100<^16l
RESISTOR-TRHR 20IC lOK C SIDE-ADJ 1T-TRN
33997
3006P-1-203
AISU1 Al, AN
0660 63S0
RESISTOR 732K i% .125W F TC*0*>100
03392
MCSC-I/8-TO-7333-F
A1SR33
OM-0054
1
RESISTOR 2.15K IK 125W F TC«0«-100
34S4S
C4-I/8-T0-2I91-F
A18RU
0«e>)4S7
1
RESISTOR 2 67K IK 125W F TC-Op-100
34S49
C4-1/6-T0- 2871-F
A1ftR)4
0767-0417
RESISTOR 582 IK 12EW F TC«0*>100
34S46
C4-1/8-T0 582R-F
AISR3S
0767-0W
RESISTOR IK IK .12AV F T04*-100
24546
C4-1/8-TO-10O1-F
A1BR3S
0698-4400
T
RESISTOR 649 l« 13SW F TCO-lOO
03293
C4-I/6-TO-649R-F
AISR37
0683-S100
RESISTOR SI S» .3SW FC TC--400/«600
01121
C8SI0S
A16R3a.R39
0683-6105
RESISTOR 61 5% .3SW FC TC--400'«SOO
01131
C95106
A1SR4I
0767-0413
1
RESISTOR 302 IK 125W F TC«O*>100
34S4S
C4-1/B-TO-3S2R-F
aisra:
0608-4439
RESISTOR I 97K It I7SW F TC^-IOO
24646
C4-1/8-T0-1871 F
A16M3
0606-4476
1
RESISTOR 10 7K It .I3SIW F TC^-100
24546
C4-1/8-TO-1073-0
AlfiR44
0683-6106
RESISTOR SI St .3SW FC TC--4O0/*S0O
01121
C96I0S
A1SR4S
0006-4430
RESISTOR 167K It 12SW F TC>O<-ia0
34S4S
C4-1/8-T0 1871- F
AISRW
0008-4447
1
RESISTOR 380 It 13SW F TC'O>-100
74S4S
C4-1/1 TO 280R-F
AISM7
07S7 0433
RESISTOR 382K It 13SW F TC-0«-IC0
24546
C4-1/8-T0-3321-F
AI6A4«
07S7-0438
RESISTOR S.I1K It .12SW F TC-0> -100
24546
C4-1/8 TO-8111 F
A18R40
0666-3379
RESISTOR 4.99K It .13SW F TC*O>-l00
24546
C4-I/B TD-4991 F
A1&R51 Ac
3100- 309S
1
RESISTOR-TRMR 300 lot C SIDE
03744
3006P 1-201
A1SRS} Ac
0699 - 6630
1
AESiSrOR 20K .1K 126W F TC^-25
03392
NE55
AISRS3 Ac
0696- 6360
RESISTOR IOK.lt I3SW F TC^-2S
03393
NESS
AISRM
0689-3431
1
RESISTOR 23.7 IK .125W f TC^-tOO
03B8B
PMESS 1/8-TO 33R7-F
AISRSS
0606-6330
RESISTOR SK It I3SW F TC4.-3S
03988
FMESS 1/8-T9-600I-B
AISRSe
3100-3161
RESISTOR-TRMR 30K lOt C SIOE-ADi 17-TRN
32997
3006P-1 203
At6R67,RSe
0683-1S0S
RESISTOR IS St .3SW FC TC.-400/.500
01121
C8150S
4lAAfte ^4
0683-1046
2
RESISTOR 10OK St 3$W FC TC
01607
CB1045
A1SR41
0683- I03S
RESISTOR 10K St 3SW FC TC--400'.700
01121
C8I03S
AIBR62
07S7-04I7
RESISTOR S62 It I2SW F TCH7.-I0O
24S45
C4-I/8-T0 562R-F
A1SR63
0767-0467
RESISTOR 63SK It .I2SW F TC^C.-IOO
24546
NA4
A1&R64
0698-6320
RESISTOR 5K IK 12SW F TC<K-25
03885
PMESS I/8-T9. 9001-8
AISMS
2100-3161
RESISTOR-TRMR 30K lOt C SIDE-AOJ 17-TRN
32997
3006P 1-203
A1SR66 AO
0683-1636
RESISTOR ISK St .3SW FC TC-~400/>900
01807
CB1639
A1SR67 AO
0663-1335
1
RESISTOR 13K5K -2SW FC TC-<-400/*800
01607
C8133S
A1SR66
0663 1036
RESISTOR lOK St 2SW FC TC--400/.700
01121
C81035
A15R69
0663-103$
RESISTOR lOK St -3SW FC TC> -400/.700
01131
C8103S
A1SR71
07 S7
1
RESISTOR 332
AISR72 Ag
3100-3122
3
RESISTOR-TRMR 100 lOt C TOP
03744
3006P-1-101
A1$R73
2100-3066
RESISTOR-THMA 5K lOK C SlOE-AOJ 17>TRN
01885
43^02
A1Bfl74
2100-3306
RESISTOR-TAMR 50K lOK C SlOE-AOJ 17-TRN
33997
3006P- 1>fi03
A1BR7S Ag
2100-3154
1
A6SISTOR-TAMR IK 10K C SlOE-AOJ 17>TRN
03744
3008P-I 102
AI6R76
0608-6782
RESISTOR 230K .St IP70 MATCHED SET RTS, 99, 911
28490
OM 8762
AtSR77
0767-0487
5
AESiSTOR 825K IK .T2S1V F TC^'100
24S4S
NA4
A16R7S AG
0757-0280
RESITOfl IK It 12SW P TCTO.-IOO
03292
C4-1/B-T0 1001 -F
A15R79
0663 1S06
RESISTOR IS St 3SW FC TC--40Q/.SaO
01121
CB1505
A1SU1 AM
0698-6964
3
RESISTOR S49K It .1W F T&4>.-ia
28460
0606 8964
AISRO AM
0696-6963
1
RESISTOR IS6K It IW F TO«.-ia
28490
0898-6963
AISRS3 Am
0696 696S
5
RESISTOR I47K It .1« F TC^-ID
38480
0808 (wes
A1 8R84
0767-0433
RESISTOR 333K It I3SMI F TC*0.-IOO
24S46
C4-T/8-T0- 3321 F
AISRSS AM
0686-6966
RESISTOR S34 It ,1W F TCTO.-I0
38490
0668-8968
A1SR86
0666-6783
RESISTOR IS8M .9t |P/0 MATCHED SET R7S8661I
36480
D699-S782
A16R68
0683-1S06
4
RESISTOR IS St ,3$W FC TC*-40CV.S00
01121
C81605
AISRW AA
FA 001 NO UST
0666-4306
RESISTOR IS.SKIt I3SWFTC>0.-I00
03393
C4-1/8-TO-1692-F
0696-3136
RESISTOR I7JK It I3SWFTC*0.-I00
83292
C4-1/8-TO-1782-F
0757-0448
RESISTOR 10.2K IK 12SW F TC*0«-100
03292
C4-t/e-TO-l682-F
0606-4483
RESISTOR 187R IK 126W F TC*0«-IOO
03292
C4-1/8-rO-l872-F
0808 41M
RESISTOR 10. IK 1K 12SW F TC*0«- 100
03292
C4- 1/8-TO- 191 2- F
0757-0440
RESISTOR 20K IK 126W FTC*0«-1X
03292
C4-1/8-TO-2002-F
A16R91
0696-9783
3
RESISTOR SET. MATCHED 3M St IP/0 MATCHEOSET
28480
0608-8752
RTS. R9S. R9II
A1SRS3
0696-6216
RESISTOR 3M St IP/0 MATCHEOSET R82. R93I
39480
0696-6216
AISRS3
0000-0216
RESISTOR 3a3K St IP/OMATCHEO SET R93. R93I
38480
0696-6218
A16RM
2100-3311
RESISTOR-TRMR SOD lOt e SIDE- AOJ 17-TRN
33987
3006P-1-B01 000 F
A18RM
07S7-3S67
1
RESISTOR 005 IK 125VV F TC«0*-100
28480
07S7-3S67
AISRSS AA
0606 5540
1
RESISTOR 1 IMSt 3SWFCTO
01807
C81196
AISRS7 AA
0683- I04S
RESISTOR lOOK St 2SW FC TC
01907
C9104S
A1BU1
1836-0340
1
IC.OPAUFL. LFM6
28480
193S-0340
A1BU3
inO-0479
1
1C LM 300 OP AMP
27014
LM308M
A1SU3.1H AH
1635-0616
2
1C 357 Of AUP TO-00
25480
163S-0S16
A1SUS
1820-0471
IC-DIGITAl SN740SN TTl HEX1
0139S
SN7406N
A1SOS
1626-03S7
1
1C LF367HOPAMP
27014
LF367H
404M748
2
E7CTRACT0R-PC 00 8LK fOLVC 052-00 THKNS
28480
4040-0746
1205-0000
1
H E AT $1 NK -SC Ml CON OUCTOR
28480
I30S-0090
1306-0003
1
HEATSINK TO-SrrO-39-PKG
28480
1206-0002
A2D A
ltin-69601
1
ASSE MiL V. A E F £ R C NCC
AA SEE NOTE ON SCHEMATIC 3
NOT FIELD REPAIRABLE ORDER
AS SEE NOTE ON SCHEMATIC 3
REPLACEMENT ASSEMBLY ACCESSORY NO. 1 1 1 77B
AC 566 NOTE <W SCHEMATIC 3. a, ei
►*G 56 6 NOTE ON SCHEMATIC a. ***• •,,
:E NOTE ON
SCHEMATIC 3
AH SEE NOTt OH SCHEMATIC 3.
A| SEE NOTE OH SCHEMATIC 3.
AK SERIAL NUM9ERS laZAOBTSe AND ASOVE REPLACE$a767-Q2BO (S03a>
AO SEE NOTE ON SCHEMATIC 3.
8-146
• •
a£R NCL IC2A044I0
Part SI is 0 reed switch which is used os a voitage breakdown device.
This part is used on 034SS-66SW Rev. B assembiies only (serial
numbers 1622A00410 and below).
The Offset Adjustment is mode by connecting a resistor between
the unlobeled lead and either the or lead. Refer to Section
V for the Offset Adjustment Procedure.
A10. Compontnt Locator Tabla.
CoiT>0df«rit
Col
GomporMni
Col
CempoASAt
Col
ComoonoAl
Col
CoAioor>Fr>l
Col
Comoon«>ni
Col
Cl
6
CR1-2
6
J1
0*0
01*6
C
R1
A
SI
A
2-3
C
3*6
0
2
£*F
6
0
2
8
4
0
6
E
3
A
7*9. 1 1
E
34
c
T1
6
S4
6
7*8
F
4
80
12
F
7-9. 11
0
2
F
7 9, 11
F
9, 11
6
6
€
13 16
C
12 19
E
U14
0
12
8
1M3
0
17-16
C-D
21*27
F
5-6
E
13 1&
C
14
E
19. 21 22
0
28 29.31 37
8
7
F
16
0
15
P
23 29
E
38
c
8
c
17
A
16*17
8
JM1 2
f
3142
F
39.4144
0
9
D
18*19
6
18-19. 21-23
C
3
0
33*36
6
45
E
11
c
21 22
A
23
t
3749
A
46
P
1M3
0
23 26
8
24
6
K».J
A
4941
6
47
6
14*16
E
26-27
C
26'26
c
3
8
4243
E
48
C
16 17
P
28*29.31
0
27 28
A
45
A
4445
A
49
C-0
18
B
3244
E
29. 31
c
6
B
46
6
61 *58
p
19
c
3^36
F
3749
0
7
A8
59.61*62
c
21
D
3749.41-49
c
4142
0
a
6
63
A'B
22 23
F
4$
D
4344
A
9
A-e
64 6$
A
24
C
46
8
4M7
8
66-69. 71-72
8
26
D
47
c-c
4849. 61-66
c
LI
A
73
C
29
E
48
0
57 58
A
74 78
0
27-29.31*35
F
49
E
69
6
79. 81
P
36
8-C
51
F
61-64
C
8263
6
37
C*0
62 S3
8
6866
0
94
0
38
0
M*S7
C
69
e
85
A
39
D-E
6e>S9.61
0
71 72
D
86*89, 91*92
8
62*63.66
E
93-96
E
W1
F
66
P
El
A
97 99
F
E?{B«<ow K9)
A*e
101 102
6
VI
F
103
c
104 106
0
106-107. Ill
E
106*109
F
Ac Serial numbers 1622A01806 ar>d above replaces C4: 0160-01 S4 (.22 fxF)
RN:0683-2025 (2 K)
The new values Improve stability in the X2 SAN configuration.
INPUT
A13
03455-66513
Rev. A
Aa For serial numbers 1622A02436 and above. The preferred value for C25 was changed from part
number 0160-2150 (33 pFI to improve frequency response near 10 kHz.
C‘>iWiGHT 1976 b< HEWI-Err-RaOOJRO CCMiUNr
Figure 8-H-30. Average Responding AC Convertor Schematic.
8-149/8-150
'M& —
UU-f-lw
A15
Rav. B & C
(Icutrumant Serial No's 1622A00906 and greater)
0S45S-66515
Re«. A
(Instrument Serial No's 1622100905 and below.)
Aa
Ad
A
A
Ag
Ah
A|
Aj
C37, C38 and H97 have been added and the value of A15R59 has beer' changed from 10 kn to
100 kn to eliminate transients during autoH'angIng which causa inaccurate "first" readings.
(Instrument Serial No's 1622A00906 and greater.)
R89 has been mads a "selected" value to improve the accuracy at 1 MHz. (Instrument Serial
No's 1622A00101 and greater.)
C36 and R96 have been added to reduce offset at elevated temperatures, (instrument Serial
No's 1622A00906 and greater.)
Relay K3 has been changed to a different type to prevent arcing during auto-ranging when
1000 V is applied to the input. (Instrument Serial No's 1622A00906 and greater.)
The values of potentiometers R72 and R75 have been decreased to improve the temperature
stability of the input amplifier circuity. The value of resistors R81 and R8S have been increased
to center the pots. Previous values were: R72, 200; R75, 2 K; R81, 5.1 1 K; R85, 562. These
changes have been made on instrument with Serial No's 1622A00906 and greater.
The following component changes have been made to improve the down-scale linearity of the
RMS converter: R17; from 2 kn to 5 kn. R23; from 68 kn to 100 kn. R25; from 25 kn to
100 kn. R51; from 100 n to 200 n. R52; from 10 kn to 20 kn. R53: from 5 kn to 10 kn.
These changes have been made on instruments with Serial No's 1 622A051 1 and greater.
Serial numbers 1622A01000 and above. Replaces 0757-0417 (562 Q) to Increase the zero ad-
justment range.
Serial numbers 1622A01806 and above replaces 5080-9080. The new part Is not hand-selected.
Serial numbers 1622A01656 and above replaces R36: 0698-4450 (324 O) and R95: 0757-0407
(200 n). R95 provides improved dc compensation. R36 essentially improves temperature sta-
bility.
Serial numbers 1622A02256 and above. Added as ac bypass of CR3.
Al Serial numbers 1622A01956 and above. Replaces 0757-0486 (825 K) to Increase the offset
adjustment range.
Am Serial numbers 1522A01206 and above the fallowing component changes were made to im-
prove Input amplifier temperature stability:
Old Part No.
R81: 0698-3382 (5490)
R82: 0698-4308 (16.9 K)
R83 : 0698-4429 (1870)
R85: 0698-4459 (634)
R71 : See padding list as per Table 6-1.
A|sj Serial numbers 1622A03136 and above. Improved specifications on U3 and U1 make the ex-
panded offset adjustment range no longer required. R18 and R31 were changed from part
number 0698-4540 (412 K) to 732 K to reduce this range and improve stability.
^0 R66 was changed from 200 K (0683-2045) to 16 K (0683-16351 to improve the first
reading after switchirtg from the 10V range to the 1 00 V range.
C33 was changed from .1 *iF (01 60-3581 ) to .22 /iF (0160-3966) to improve accuracy at
30 Hz.
L9CATEC
ccvT"
«AR «ML
^TdtP »4(»t
r^jE NP>*S CCMvIRfFH
03A»-S6ftlS
.MTU)B d
5M55« $€N^
NOAMAL AC
»4V0-p R.1>PL£
KCAMP
,7SV0C
7S2K
*e.67 VDC
AT PULL SCALS
Cl«
20p^
PULL SCALE NDU7
AT lOOfZ
ROOT
CAr^
732R
i,4Vp 9* (OOM<
«/PULl SCALE iNROT
:*2d*P
'FOOK
iCHa
''4^;v
SH.
— .NV
NR4
S320
P*9ffV(
lOOV
MRl*' —
'•uo»
R93
20^H
iPCpf
\
. ,jMPh
5«^p'
nCM UiTIftl
lOV
hM4- —
FBCV unc^l
Figure 8-H-31. True RMS AC Convertor Schematic.
8-151/8-152
COP"»»i5-T 1976 HE«.ETT-ftiC«4At COWFA*,/
A10
03455«6510
Rev. C
NOTE 1 : UNKNOWN RESISTANCE IS MEASURED -
NOTE 2: REFERENCE RESISTANCE IS MEASURED *
NOTE 3: K9 IS CLOSED DURING REFERENCE MEASUREMENT
NOTE 4: K2 AND K4 ARE CLOSED DURING 2-WIRE KO MEASUREMENTS
NOTE 5: K3 IS CLOSED DURING 4-WIRE KO MEASUREMENTS
A12
034SS-66512
Rev. A
The value of resietors R7, R8, R16, and R17 have been changed from 4,99 kO to 10 kO to
properly bias differential amplifiers Q1 and Q5. These changes have been mads on instruments
with Serial No's 1622A01056 and greater.
Ab The value of resistor R7, R6. R1 6, R1 6 have been changed from 10 K <0757-0442) to 4.99
K (0698-3279) end C3 has been changed from .039 (0160-0164) to .0047 fiF
(0160-01671 to eliminate first readirtg errors. These changes have been made on in-
struments with serial numbers 1622A04631 and above.
A11
034S5-66511
Rev. A
A11
03455-66511
Rev. B
A20
03455-66520
Rev. A
Aao
03455-66520
Rev. B
A Serial Numbers 1 622 A01 6956 and above A20 replaces all, part number 03455-6651 1.
Aa Serial numbers 1622A02106 and above replaces 0160-0820 (.05 |LlF) as frequency compensation
to supress U2 Oscillations.
A 0 Replaced with A20 assembly only for serial numbers 1622A05871 and above.
8-155
CO^ftiGHT
I9?7 BY PACKARD CCAfOMY
J'4i4lA
I COMR SlO€“ 16 34se>g-«$9o
A CKT SIDE 8
A14
0345S-66514
Rev. A
The value of R44 has been changed from 40 MO to 2 MO to prevent the zero-detect compara-
tor from oscillating. Instruments with Serial No’s 1622A01056 and greater have this change
incorporated.
**6 Serial numbers 1 622A05231 and above the following component changes have been made
to improve reliability of A1 0U1 5:
Old Pert No,
R1: 06B3-4335 (5.1 K1
R18: 0757-0435 (3-92 K1
R19: 0757-0421 (8261
R20: 0757-0442 (10 KJ
CR2: 1901-0040
CR6; 1901-0040
COPyPlOHT 1976 er hcwlett-packaro company
ua HO.
4HD «1.0«
B
C
E
03455«6510
Rev. C
A10. Component Locator Tftbla.
thGUARD MOTHE>» BOARD
03499-66510
lO-'TOUARO
StOTHFR BOARD
05455'66S0I
CONTROL LiN£3
TDRN 'ON
POWER
UP
I I JAt6>
U3SA
TO 0,10,111
^NTCRRyPt
PROM
^UNCtroKU^
R9: ^ psy .,’?vk
MASTER CLOCK
0<9
LATCH
CLK POR 60*b
SETTINO
016
LATCH
UIA
LATCH
'NVCATED
4M4v
)MRANY
SMB
NO.
tm MaTE»(«v
C32 has be«n changed from 2.2 /iF to .22 fiF to eliminate double entry of front panel keys.
C46 applies to serial numbers 1 622A01 506 and above. C46 serves to reduce turn-on noise
causino false Interruots.
A1 Component Locetoi TeM«.
DDQGODQQDODQODDDDDGDDDODDDOn
COPYRIOMT
1976 BY HEWLETT PACKARD COWPANY
DODODDDQDDDDDDDDQDODOODDDOIID
components changed the 03455-66501 Assembly from Rev, A to Rev. C.
Ag A1U57 has been changed from a standard power TTL to a low power TTL device and resistor
assemblies A2R17 and R18 changed from 2.2 kfl to 10 kfi to reduce the effects of switch
contact resistance. This change has been made on instruments with Serial No's 1622A00906
and greater.
^ Resistor R69 and capacitor C44 have been added to filter out pulses caused by switch bounce
to eliminate "double entries" In the MATH mode. Addition of these components change the
03455-66501 assembly from Rev. C to Rev. D. This change has been made on instruments
with Serial No's 1622A01506 and greater.
A1 Componsnl Locitoc TiM*.
A2
03455-66502
Rev. A
Co'nooi'VRi
Col
CofTipcn«f>t
Col
Con>pon«(il
Col
CompoA«<it
Col
Comooflort
Col
Componont
Col
ci.$
A
CRI
6
J1
A
Q1-2
A
R1-7
A
U1 6
A
6*9
B
29
c
2
6-C
34
e
69
B
6-11
8
11 12
B
IM3
0
3
B
76
6
17-19
A
12 26
C
13-14
C
I4>16
6
4-6
D
9
e
21 26
B
2732
D
16 n
c
16
F
6
0-E
11 18
G
29. 3143
C
3348
t
iei9
0
J
P
34 36
0
4963
f
21
0
B
P-C
36
c
64 71
C
22
0-6
9
G
3739
6
23 29
t
41-44
6
3143
E
46-49
P
3449
F
61 69
P
VI
p
4t
P
61«3
P
42
G
JM1
P-G
6467
G
4344
P
2
F
66
C
46
CO
3
D
69
P
1
1
Li
F
SI
A
'
I I DODDDDODODDDOODDDDDODDDDDDDD L
CC^«H
rt
P«CMAO COMMMY
1113 ^
Figure 8-H-38. Front Panel Assembly.
8-171/8-172
HI-
Section VIII
Model 3455A
Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
1
Mfr
Code
Mfr Part Number
i
A«mA<iIV» «jy|«Ki ><cs
H
y>4y>«»w>yl
4a. 1
Ja
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21
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J >00103X703342
t
j
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7
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4lv>
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j
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y » vi
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1 >00106X902262
ftlbV
c«p*ci lyx-i'A. *:«^yf»-44« /<«d>v i«
>6«d9
15i;')st25Xvy20A2
AlvU
W”A*«y
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AivU
gi
L«P4. 1 At.' |s*Jl f-| J » 4 JV «. 1a
SotAA
J90J 1044 •92912
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4
V.PA.l 1vP-»I^b *-«4. 1. !.*•
264. y
6i>y«ouy
AU44
j 4 »^w>74
>4syJ7
i>bUiy6X9020F2
Aid*
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4
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0P2E.y
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»2.9
l>yD^26Xyi)l>32
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>Vd6>
i>jyia>xvoi342
Aiw««
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A
b^PAbl /.uAJAeAy^-ii^. WVn4v .U
2«4V9
0160-0424
Aa«.4«
A4ty04'*4
|.A4AC.4t.'««»Av i>V M: I*
>4269
ISJoJ WX703542
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bAPACllJK-AM) Iwf *-iy . i9V3L TA
we»
1500 105X403562
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y4yy*y«;9i
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902«2
1500105X703542
A4d»
A1 2A
y
w.sPACUtW-1-AO «yvPP *••>4 yjye^yi. SKA
724i>
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aIv4 7
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cA»A.4lOP-*At. i»y«44. U
>62 4V
l»Jiy5X403>A2
A|v4»
i
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2o462
01d0-d204
Alvd*
Ai«H4/»
CAPAbI S uA-PAP «d^OF*-|y. i»VUb lA
>.2e>
15'7D< 24X20)542
Ali.44
ui UH J«»|
b*PALtfuA-fAU 4JPA-4U. A>yyC iA
>s>26 9
1500103XV035A2
A4<»>« Aa
tfiA.u-1736
1
\hAPACi7U«-» AC 2UF«-10K36V0CTA
66280
1900274X6036 A3
A4i.i>
yi(H^£4.y9
4
bAPAb 4 iuh*r Ap «ydi(^ ♦By*«:y. ^>aV)& ceK
2«4yj
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bAP.CilUK*rAJ diypi* >2yoVJC hic4
2o469
0160-0342
• 4.J»
A4«rt/*U.V4
bMPAUrpM«»AP 4pF»*iy. U
9N2S9
1500105X703542
A4Ci»
CAPALUiJH^FXO oblyp *4>*dy4 lyjAVbb
264«0
01 >0-0093
AIC«7
yi«u-yjE*^
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22460
yl60- 0342
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1500105X9035X2
AlL 4*
yi<M-0«:9l
LaFa:iIUM-FXv iJFe-4y. 1A
>.2y9
1500105XV035A2
A1C41
OfeO-Ol9S
1
OVACITOA-FXO tOOOFF «-20% 2S0WVAC CSR
26460
0160-0195
A1C42
otacMmt
CAPACITOA-FXO 1UF 3SVDC TA
66289
1900106X909$A7
A1C43 A|
Qfi0-0»t
CAFAC<TOA-FXO 1UF 3SVOC TA
04200
1900I06X909SA2
A1CM Ac
0tt0>t701
CAFACITQA-FXO 6JUF *-20% 6VOC TA
04200
I500685X0006A7
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0474)
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04713
SXl 646-9
4y C4«yv>^
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2«4«0
19W1-0050
A1CK4
4 Vb4~vw»y
p|pyC*S«lfCHi*«c «yy 2yyHi JCr*7
26460
1901-0959
A4UAA
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26460
1901-00 >y
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1N>35U
A4vK»
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26460
1901-0026
A4CHV
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26460
IVOl-0026
Ai«K44
iy0i-Uw»y
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26460
1901-0050
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26460
1902-0949
A4bKi4
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1
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04713
$1 10939-14
A4bH4A
4Vy2«'Dt«l
043U-2NA Ih^iVIo l«V 61 Fy»»n K««7>«
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1953516
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AlWHlo
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AIJI
4^)4-ii>»
1
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27244
09-60-104112403-0461
A444
U>4*4y|}
1
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27244
22-04-2141
AI44
r«
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09-60-1061
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27244
22-04-2061
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22-04-2161
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26462
16>3-0010
A 4^^
4»>4-0^iy
i
tMANSI&70K NPA &<Ud22 6l lj-|6 PO«6yO*i6
04713
2N2222
Aiyj
lAt^OwiO
rAAHSJSTPP NPh 4M2244 >J ti-l« PP*6yjn«
04713
2N2222
AIWA
4Atj<»yuiy
fMAISISTOA PNP SI ?U-U Pp«KyN«
26469
1653-0010
A|y»
iA&4-o«:iy
TAANSISTOA NPa iN2AA2 SI fP-lA P0«>0yNA
04713
2N2222
A4y6
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26410
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Aiy7
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2646 0
1653-0020
AIWA
i«&>«ou^y
UA^SIStUK PSP SI PP«3yyH6 FT«1S0NH2
26400
1653-0020
AM
4«9)-oy^o
fMNSISrUA PV SJ PP«>2yM« Ft«lS0NN2
26460
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A4y44
lA&HO^y?
A
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26460
1653-0409
0160-3622
CAPAOTOn-FXO .1UF *60 - »« 10PV0C C€ A
1 26460
01603627
aa see note on schematics
AS SEE NOTE ON SCHEMATIC 10
AC SEE NOTE ON SCHEMATIC 10
AQ SEE NOTE ON SCHEMATIC 10
■ ■
8-162
Model 3455A
Section VIII
Replaceable Part$
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
k49^t}^Jt
iKANSISIUk PAB >1 JAHl IO-<AdA6 PIiaaOM
26660
1893-0439
l9U~(h^9
iKAKSiStUM PNP UAHI Td-22aA. BOaaJb
26660
1153-0600
THAHblbTlA^ HNi* »1 bAMl Jo-4^>A« t^UebO*
20480
1093-04 09
Alwt>
4w»~gAgv
IKANSISIUA BNP aI OAKl IJ-220A* BU'bUB
2A480
U53- 06 00
ib>i*6AJl
UA'l&leTOA PNP bl OAIU. |0-<40A4»
28400
1893-0409
THAHalaTOH I'NP al »MaL fU-420A9 PO«b0«
28480
1893-0409
Aigu
ibai-(K Jv
tKAN^lbrOk al OAAL r«*-440A» PO«bOv
28400
1093-0409
AlHl
4
AtaISlOH C.lta lb .1294 P lb»0»-10w
16701
RFbCI/I-TO-6101-F
AiH«
u797-g«n
«
At»J9f(M J.wU 13 .U>4 F lC«J4-i0i)
26666
C4-l/0-fO-iOU-F
AUj
KabUIUI B.ISK It .12li> f U.*0*-ldW
19701
>IF6CI/A-t0-6l01-F
AlK%
drjr-UA>}
k<a(blU1 i.vlA it .1294 P rt«0«-i00
24900
l6-l/a-IO-)IUt-F
AiK9
g7b7-Ckoi
u
K.tUIOR 2A 1. ,t26a P IC>d*-tOJ
26666
C6-i/B-ro-2aoi-F
A4A6
unr-iiAS^
RctlStW B.IW 14 ,127a F lkad>-l9U
19701
HF6(l/S-IO-6IOi-F
A4«7
J7S7«b«rj
AP9I9I0A 9*uU It .12>« P U*oa-L00
24946
C4-1/I-70-30U-F
AlxH
urs-r-u<yu
k:alSIUB B.ltK It ,129 b F rtadP-IWO
19701
HF6CI/*-rO-6191-F
AIK9
gft7'>w73
K4.91&KJA iowU It .14>» P JC*3b-iOO
24946
C6-1/I- TO-IOll-F
• IaU
0767-0420
9
KPbmUK 790 41 «U9A F l4*0P-100
26666
t6-l/»-I0-7S1-F
Atoli
07ir->»s0l
1
AcSUIlAl 160 14 ,9a F tkai)a-IJ0
19701
"F 7C-U2-I0-151-F
A4«4i
J«V0«AAuA
J
■rbUIlM i9«U it *1290 F IC^OP-IOO
24946
L4-I/8-T0-I912-F
AiAlA
07>/»u.*Ay
9
UAISIIW 22, BP- It .I29B F t(.•Ua-10C
24944
C6*l/8-TO-2262-F
*|Kl»
07S7-0200
J
A^tlalO I12K It ,l29a F IfOP-lOO
26666
C6-l/S-ro-l332-F
AlAi«
a727*04l9
i
RoISlOH 901 it •I294 f 1b*JP-t00
24946
C6-l/t-T0-eSIR-F
Atxir
07S7-(Hb&
b
RLlltlOl lOOK It ,129a f f,‘9*-l00
24946
66.1/0.TO-IOO3-F
Airtll»
07}7-0j4y
22.AA it *I2 jIi F 7C»OP-lOg
26566
C6-1/8-I0-2262-F
*lHi»
0767-02ES
U.91SII* I13K It ,12>a F IC-d*-100
24946
C6-1/S-T0-1332-F
Al«2i
07 2l*0Ai9
Mi.9Uiai 661 It ,129 b F lL<0a-10B
24946
C6-1/R-I0-6IIR-F
AIM^^
07»7-0Bb6
KtSlillK loot U ,I26B F IC-OF-IOO
2 b66b
C6-1/I- lO-lDOl-F
•WbUrUR it* IK it *U9» P rc«0p-l00
24946
C4-I/8-70-1912-F
AU^A
07S7-028B
ACSISIOI I3JK 11 ,126a F ICaO*-100
24946
C6-l/H-ro-1332-F
AlA^b
0797-0419
RlblbiUR 941 It *U9M p l«.*0»-100
24946
C6-l/*-I0-6SIR-F
Ai«dO
0797-OA69
ALbisim iooR !• *1294 P r:«o«-iuo
24949
L4-t/8-70-l003-f
AlA^r
0»9d-AAd%
AiPlblOK iV*K U .U90 F K-O^IOO
26566
C6-1/0-TO-1012-F
AlH^tf
0797*0^A9
HL9I9I0R 22.6A It .1294 P It-Oa-aOU
24946
C4- 1/8- 70-2 2 62 -f
A1a^»
07S7-OA10
1
HlSISMJR 301 4 4 *1290 F Ib«i>^l00
24946
C6-12R-T0-301H-F
A|ft>4
0797-OAbS
AbSISlOR lOOK 14 .U9M P U*Je-|OJ
26566
L4-1/8-TO-I003-F
AlM»<
0797-Q4:«i
Ht^lblOR 2A 1« *I29N ^ Tb-OP-lOO
24946
C6-1/S-T0-2001-F
AIK}}
i)7>7-u;:ai7
1}
RlilBlUi IK U .129B F ICaja-IOd
24S46
C4-1/8-T0-1Q0I-F
AirtA«
0797-0^ i»0
UblStCR IK 11 *129« P rc«JP-lJO
24946
C4-1/8- ro-IOOl-F
AiHiS
07S7-V4A4
6
AeSIStCA lOK 14 *1290 F rC«0P-103
24946
(6-l/a-TO-l002-F
AlAjft
U7i7-UAA}
HcalSTOl 2K It .1*90 P fb^de-lOO
24946
C4-l/e-TO-2301-F
A|A)7
i>797*o«^i
HPblStOH 2R It .I2S0 P 1t*J»-100
24946
C4-I/8-70-2001-F
A1«M
J797-U&OJ
fUalSICW 2R it *1290 f TC-3P-100
24946
C6-l/a-T0-290l-F
AlAi9
07}7-l>.:«}
KaSISI)* 2R 1a ,126H F Ka0*-10O
24946
C4-I/8-70-200I-F
AlAAO
ibia*0w$s
1
NtlaUKK-KE9 9 -B 1 H- 9 IP ,l>-PIN-6PtB
2A683
laiO-0055
AU4i
J7b7-Olv9
4
He9l$IOK 21* 9K It *1290 f 7C»0*-100
24946
C6-128-T0-2152-F
AUAk
<i76T-0i44
RrSIStCR 2I.4K It .|29a F rC«Ub-|U0
24946
C 4-1/8- 70-2 192-F
AUA>
0791-OaT}
AaaISIIM }.u1k 14 ,126a F 7C-0F-100
26566
C6-i/a-?o-}ott-F
AA4AA
al97-OB*<
KlitlblA lOK W *12>0 f rteOP-lUO
26566
C6-l/a-IO-l0O2-F
Al4A>
aAS«-AA»J
1
Hi.al}IIM 602 It ,126k F IC'Da-lOO
24946
C4-I/8-70-4Q2R-F
AU4*
0797- OaUI
AiaSISTOR lOo It *1290 P TC«OP-IOO
26566
C6-i/a-io-ioi-F
AUAI
I>79i-UJAB
1
RLtlSIOt 36 1 : ,126a F ICa3F-lbJ
24946
(6-|/a-IO-}6R0-F
Ai4Ab
0797-0407
i
A49I91W 20v It *1290 F TC*0 p-I00
24946
C4-1/8-T0-20I-F
Al4A«
07S7-UAU7
ktbISrifi 200 It *I29» P IC*OP-IOO
24946
c6-i/a- ro-201-F
AIkH
0797-04^9
2
KLbltlO l*02K 14 .1290 F fC*Oa-loO
24946
C4-I/8-T0-I821-F
Ai«>k
0797-MtfAJ
Kl}l6ll»( IK 14 ,I26B F rC‘7F-|00
24946
C4-I/0- ro-IQOl-F
Al)C»>
i>T»7-Ub2«
ACal&IIAl 4.02K It *1290 P Tb«0*-100
24946
e6-i/a-io-it2t-F
Al«>«
07 97-0407
ftcSlbTlH 200 It .1290 f r«.«OP-aOO
24946
C4-I/8-T0-20I-P
AU»
J»9«-4i/J
1
MtlSlUi 49V l4 *1290 r Itp«04-I00
24946
C4-I/I-T0-499R-F
AU>»
0757-0«0i
NkblSIlBl 2R It .U9U p rC*JP-IOO
24946
C6-I/8-TO-2DOI-F
A|Mb7
0767- UaA}
RtSISIUH 2K II ,126« F IfOF-lOO
24946
C6-l/a-T0-2901-F
AiA>»
ki7}7-i>.;«}
«l6l67tJt 2K It ,126a F rC'OF-lOO
24546
C6-1/8-TO-200I-F
A In >9
0797-0^00
AtSISIQH U It *1290 P IC»0«-100
24946
C4-I/8-TO-1301-P
AlHAi
i>7»i-a<ju
KISISUM IK 14 .1262 F HaOb-IOO
26566
C6-l/t-I0-1001-F
AlKM
j7»7-<;a«.4
HL6I6I0A IK 14 ,126a F IC«0>-(00
26566
16-l/a-TO-lOOl-F
AUb}
J767-e*K<)
1
A.919I4M 790 It *4290 f 70*0*- lOO
24946
C4-1/8-T0-79I-F
Ai«AA
A^kltllK IK 1 a ,I26b F Ib-Of-IOO
26566
C6-l/a-T0-l00l-F
aUbs
0797-0*4*0
AcbUlOl IK It *1290 F lb*JP-IOO
24946
C4-1/8- 70-1 001 -F
a1aa«
d7}7-(U6i7
Kb9l6IU( IK 14 ,126a F IfaF-lM
24946
C6-l/a-TO-i001-f
Ai«67
0797-0^00
ACtlSTOA U l4 *1290 P T4aOP-IOO
24946
C4-I 78-TO-IOOI-P
Ainss aa
0767-0U2
RESISTOR 10K l« .I2SW
(ozn
C4-1/V-TO-ICD2-F
Atnat At
0767-0401
RESISTOR 100 1% .12SW F TC>0>-IOO
03207
C4-1/S-TO-I01-F
AIS1
3101-1973
1
SWITCH-SI 7-1A-N8 DIP-SLIOE-ASSY .lA
11237
30a TYPE
AiOl
lti»-l20U
2
IL-OICITAI. 6N76LS06N TFl (.} rtti 1
01205
SN74LSOSN
AiU4
l«^il97
7
l6-OIOttAt kRTattOON til 1 } OOAO Z HAND
01299
6H76l$30Y
AIUJ
lt20-tU>}
i
IC-OlBitAL SN76I6N ITL HEt 1
01299
SN7414V
AiOA
19^1112
9
K-OIOITAI 6H761S76H III Li OOAl
01205
6N761S76N
Alsf>
1920- i400
IC-0I61IA1. aNI6L606N III LS HtK 1
01299
SN76LS05N
Aa see »
DTE ON SCHEMATIC 1(
A| SEE NOTE ON SCHEUATfC 10
■
8-163
Section VIII
Model 34SSA
Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
41J9
H
U-JIuKAl KLi**l» tl<« wu«u
OA74)
NC3994^
«iJf
lwA\^ I.A^
U-Jl.*irAl .*MALS2TM ITL L:» 4H i MCA
M II II 1
• NMIS2TN
l.-dUITU <NruSu*A III l» HK 1
vrnn
SN79LS09N
A4*.»V
i««>^l9>J
SU->IU4fAL HCA961P ru« goA8
Hsm
NCi**lP
Aisliv
ll-3ll>.lia <N/*lS0V> III 1* HlX 1
UU9S
SNT4L SO*N
AltJU
K.-O-tl lu
29
i:-0ll4|1Al ^NlAtAlYfaN ftL lS M£A
4129S
SHT*L SlTlN
AaJU
4«
K-3l>.ITAl HCi**tP III* WU*U
MI13
NCJ491P
AiJi*
l94fi*UJl
U-UlullAl <NI«l*<MN m L< JJAJ i MO
0129S
SN79LSD8N
l4->lblTAl aN^AtaOOM III l> gUAg 2 HA*iO
0129S
sNinsoiM
l*e^4 H9
lt-)lg|rAL SN7ALS03N tU Lfa OUAU 2 ^AMU
01299
SNT*l S03N
K-Oli*ltAL faA74lfaej44 UL La MAj 2 HAHV
0U9S
SNI41SQ3N
AlJxl
k«/w-UVJ
IC-l|l<ll«l *1f»LS03S III IS 2 ‘<*ND
U129S
SN79LS08N
AiJle
IC-JIbITU SNI4LS0M III IS <OAU < •IMJ
0129S
SNI4LS93N
*4 Ji«
l•4^^449•
ll-OI<<ll*l III 1* HEX
0429S
SNT41S1T4N
l«4k^4l^6
ic-3lVfjrAi. jHIalisUmh ra \.> hkx
0129S
SNI41S1T4N
44JAS
U-3IUIUI SNt«lSI<3« III 1* gu*0 1 lus
0429S
SNl4lS12$H
lAAKl^wll
ll-riigiTU 111 1* MJilU 1 JU»
UI29S
SN79L S429N
44 J«>
luiQ-Ufts
j;-g|g|IAl «N7faifa|74N ML bfa HfX
0I29S
SN741S174N
AiJ^e
4«2i>-4Wa
U-OIClfAl aNf^LSUAN tXL IS HkA
01299
SNIHSt I4N
«IJ4>
U-OlbllAL .NIMtlTM III 11 HEX
0IZ9S
SN79LS1 79N
ALj/it
l•4i4-IU^
i:-IIISIIAl MI«IW*N 111 1* [>g*l
01299
SN79LS79H
|9 JA-«/«/7»
01006 AMAAY
2IA80
1906-0079
Ai^40
U2i>-l46a
ll-UiCIIAl ^NIlLXlAtK TIL IS
04299
SNT41$IB1N
ieA0-ii9o
IC-3ICII*l SNI*iSII*H III IS HEX
01299
SNI41S174N
AIJ^U
IL-mbllAL ShlSlSlSlN III IS
0129S
aN7HS181N
Al^ai
4AA>*n9A
U-016ITA4 3H741S174N flL ta a6A
01X9S
SNTHS174M
A1J4C
IC-3ISIIM SNTIISJ2N III IS OUAJ 2 OH
01299
SNT4LS32H
A4 Jjj
lA^UlA
2
IC-3|glTAt 8N7Aifa4)8M Hi L& S
0129S
SN741S13IN
*iv>4
U'OIOIIAI SN/IIS12SN III L< 00*0 1 aUS
04299
SHI4L$12$N
A4s«A>
iL-3lbil*L INIILSUSN III IS vUSO 1 BUS
0U9S
SN741S12$N
Aii»B
2
l&*JICII*L ShTHSIkSN III IS BIH
0U9S
SN79LS169N
AlJ^7
IA^4«>2
U-OICltAL &n;ALSU 3N ffL IS 0iH
01299
SN741S143N
A|g>o
IC-OIOITAL ^N74ifa08N 1 7L Lfa gUAO 2 AMD
01299
SN79LS06H
A|J>*
402(Kli99
ll-SIOIIAl MIllSOM ITL 4.S HlX 1
04299
SN79LS09N
A4JM
48211-4142
U-OiulTAL aH74Lfa7AN 7 7l. Ca gOAL
012*S
SN79LS79N
A4JA4
I02kj-U1A
IC-JlGltAL fa*irALfal38«« m LS 9
0129$
SN74LS130N
AlJ^<
48^4>4S
K-3lg|tAl faNIAL&429N TU LS gOAO 1 80S
01299
SHT41S12$N
Al J<»i
l0 2kH IbOA
Il-OIGIUI SHrHSI2SN IIL IS O0*0 1 BUS
0129$
SN79LS129N
AiJA^
i fa 18-01 99
2
1C AN9112A^ U 8AM NHJi
3*33$
4H9112XPC
AiJA»
4« 18-0199
ib AM9442AK 48 RAM N"Oa
1A33S
AN9412AK
A|J«H.
1«20*4*V«
l.-DISIIAl SHTHSOSN IIL LS OOAU i NMO
04299
SN79LS05N
klotT
IDJO-I^JI
IC-JlvITAL SN74iSg8N TU IS UOAO 2 AND
0129$
SN741S0W
A4««4A
IAaO-IA^A
4
IC-3S&JTA4. aN74LSl2TN TU LS OOAL
04299
SN79LS42)N
U20-il9)
ll-)liill*l iNIHSOlN III IS HEX 1
01299
SN79LS09N
A4i^>w
tS«<-t.4T
IC-3lt*iTAL iN7AiS00N ITt LS OOAg 2 HAND
0U9$
SN74LS00N
AIU»A
1820-1496
ll-DieiTAl SHI*LSil*N Til IS HEX
01299
SN794.S1 79N
A|<ia^
IBM-tlTy
IC-OlbJTAL SN/aASOaN ML Lfa rl6A 4
04299
SN74LS04N
A1J»>
I 02 O-I 4 O 6
II-3I0ITAI SNIILS2TN IlL l< TBL 9 MM
01299
SN7HS2 7N
AiJ^A
4fa2<^4496
K-OICITAl SHTHSITIN III Is HEX
0129$
SN79LSI79N
AiJd»
IC-OICITAL aN74LS00N TU Lfa gOAO 2 NANO
04289
SN79LS00N
AlU>o
4a«i>-44fa9
2
Ik-OlbllAl SNIHISISSH III IS UUAL t
0129S
SN741SI S$N
A4J«»7 Aa
itf^o-oee?
4
1C ENCOft TTl 1 e-INP
02237
S3L18PC
AlJ9a
4820-1196
IS-SICITAl SNTHSllHN III IS HEX
01295
SN741SI 74N
Aik»^
14<I^U)8
IC-dieiTAl SNI41S0SN III LS oOAO 2 NANO
0129$
SN741S03N
Ai JoO
4820-4198
lv-OI»lt*l sNTHSUM IIL IS O0«0 2 NMO
04299
aN79iS03N
AlJAe
i»^>>-u«r
iL-OlolTAL SN/ALSMN TU La wOAO Z NANO
04299
SN79LSOON
A|g«^
4821^1609
i
U-OICIIXl SHTALSIBN III IS *
0129$
SN79LS96N
A1 JQ>
K«ii-ll1&
ll-JICIIU sNNLSi:*N III is HEX
0129$
SN74L S1I4N
A4064
I820-4a9>
JC-3fCJTAL »N?HS4SSN TTL IS DUAL 2
0129$
SNI41SI$$M
A li/69
K-3tStl*l SNTHStrsN III lS hex
0129$
SN741S1 74N
A4 JM>
l« <0-119*
ll-OllillU. sNT*lSIT*N III LS HEX
0129$
SN741S174N
Aii/oT
1820-4199
IC'SICITAl SNT41SIT«H III IS HEX
0129$
SN741SII4N
A|t>6«
4»«0-449fa
IC-OICltXl SNI4LS1T4H III IS HEX
0129$
SN79LS4 79N
■•UuS
l<t2>lt«*
Il-OICIIBI sNIHSITlH III IS HEX
0129$
SN741SIT4N
A4il/U
4820-1499
IC-IICIIXl SNI*lStr*M IIL IS HEX
04299
SN79LS1 79N
Aiort
1
IL-IUITAL uS«»*3N HOS* OsPl ORVX
2ID11
0$«8»3N
Ain
0A4O-4i>04
1
iHlSKlt WUXillE IJ MHZ
28980
OA 10- loot
l2iM-0A«b
1
SJSxEiiic 14-PIN PI nouniiNe
26969
I20»-0*I$
t^M-0<i73
i
W;A61-IC Ib-Ll/NT Oi^-SLOM
26980
4200- 097J
UJCIHOUO 9
2
•uOS gAA-N82i
00000
oeo
0i«i^0*«T
7
•BOS HW-NB23
ouooo
080
S0*u-0tlu
2
OJIJ62AUO-1N 8C (HJAMg
28980
9090-0170
Sft NOTE ON SCHEMATIC 10
S-164
Model 345SA
Section VIII
Replaceable Parts
Reference
Designation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
0i«»^4i*>02
1
p; AS»«H6Lir> OlaPLAT
26943
03933-4*302
AACHI
i9«>-0)A7
36
Ic3-VIS1M.£ LU9-lNT*2nC3 l»«20«tA-NAl
20400
1660-03*7
IV«^0>a7
UD-VIS1M.C LUn-lNT«2MC9 |f*20HA-RAX
20400
1991^0647
A2LIL*
i9«o-a5*r
UJ-VISiSLt lUn-INT*2nC0 IF«20NA-MAJt
20400
1660-03*7
A<wHi
U2-VISIM.6 LU«6-1NT»2HC0 |f*20NA-MAA
20400
1990-0947
A2CH&
iyw-o»A7
Ui)-V1S16LE UIH-INT-2ACJ IF-2iJNA-<<AX
20400
1*60-0397
A2CIU
i9W-u»«r
Lcrf-VISItll lU»-<Nr«2HCU iF-iUHA-HAX
20400
1660-0397
A2LHf
LcO-V|$|4Lfe LJ»-lNra2MCO 16*2 JNA-MAX
20400
1990-0647
A2CM
ikso-u:>*r
UO-VISItLE UJ>»>IHr*2<ICU iF«23l<A-MAX
20400
1660-0397
L9W*0aAI
uo-vuieu LUH-|Nf*2MC0 |fa2JH*MnAi
20400
1990-0647
A2CHAJ
l99ii~0S9f
UO-VJSIALC LUf*-JMT«2HC0 l^«20M*-9AX
26943
1660-0397
AAkHtl
11W>-0>*T
iEO-VISlMt lV(^INl«2NC0 IF*20HA-MAX
20400
1660-0397
A^.AI«
I99^u»«r
UO-VUIOiC i0M-|Nr«2MCU IP*20(IA-NAA
20400
1990-0647
A2kHlA
I9SO-OA2
lEO-VISIAlt iU)»*INTa2MC3 IF»20I<A-NA1
20400
1660-0397
A2b K14
lV9i^0)A7
l.t3-VISI6kt Ll2*-INT-2llCa IF>20NA-NAA
21963
1990-0647
19«0-0>A2
LE0-ViSI6tE lUI^IMTa2HCD IF«20HA-HAX
20400
1*60-0397
A2CHi»
199^0^97
lAO-VSSJOLC lUfKIhfeAACU IFe2onA-MAX
20400
1*60-0397
A2CAir
I99i>0>47
UD-VfSIOU kUA-lHT«2KC0 1F«20IU-9AX
20400
1690-0397
A2LR16
I99l^0d47
L10-V1SSI4C iUI*-lNTa2HC0 lFa20HA-«AX
26960
1990-0647
1990-U>Ar
LtU-ViSI6kE LUH-INI-2RC9 IF»23HA-AAX
20400
1960-0397
A2U(<a
1990-0 >4 7
LbO-VlSlOlE 1U*^IKT«2RCJ lFe20NA-NAX
20409
1960-0397
A^WIUi
!99<>-ti^47
UO-VISISU LUM-lMf-iNCJ JF-20NA-NAX
20400
1990-0647
1990- 0447
itO-VI$IM.E lUK-IHr>2HC0 IE«2<MA-HAX
20400
1990-0647
A2tH2>
199i^0>47
U0-VJS1M.C UIM-CNT«2NCD <Fe20RA-AAX
20400
1690-0397
A«kR2*
lES-VISIMt LUH-IHI>2HCI> IF«20)U-HAX
26960
1660-0397
A2wi2i
1990-0MT
U9-V1SI8LC LUN-lNr*2RCJ |Pa20MA-HAI
20400
1660-0397
AJClUk
19f0-0>*T
U0-VIS161E LUH-IHT-211CD IF'2<>NA-AAX
20400
1990-0647
A2kA<2
l990-0>9}
Ul>-VISI6«.E LI7H-IHT-2ACO IF-«MA-HAX
20400
1990-0397
A2^A^d
1990-0447
tCO-VI$IK€ LUM-tNT«2HCO lFa20RA-MAX
20400
1990-0647
A2vli2^
199^0447
ibO-VlSIM.4 tOR-JH7«2ACO 1Fa20HA-flAX
26960
1960-0597
A^UUW
1990-0947
Lt3-ViSlM.E LUI»-INT*2nL0 |F«20IU-<UX
20400
1990-0647
A^CtUi
199^0>47
LIO-VISIOU L0»-iNf*2»U> |F*20MA-HAX
20400
1990-0647
1990-0947
LfcO-VtSlOLfc tO»-INI«2MCi> |Fe20MA-HAI
20400
1990-0647
A2CHA3
19 9k>-094 7
LtO-VJ$IALC LUn-lNTa2MCJ 1F«20RA-HAX
20400
1990-0647
A2lrA>V
l99»-0>9r
LfcO-VISIBlE LUH-iNT«2HC0 IF«20HA-HAX
26963
1690-0397
A2i.K3»
1990-0947
LlJ-VlSlftlE LUM-INT-2MC0 1X«20MA-IUX
20400
1990-0647
A2^^1
1990-0>A9
OISFIAT-NUM SE6 .S-CKAA .406-H
26960
1960-0336
199U-0»*li
DiSFkXV-Mtn Stb I-CHA6 .9X-H
24980
1690-0390
A2l>^i
1990-0940
D1 SPLAT-MOM S€C 1-CMAX .AJ-H
20400
1990-0940
i990-0>40
OtSFlAT-NUN SAC 1-CHAK .Ai-M
20460
1990-0640
A2UdA»
1990-0940
01 SPLAT-MUM S£6 1-CHAA *4i-M
20460
1990-0640
A2i>lH>-DSMS
199^0940
OISPLAY-NUM S«G 1-CHAp *4>-H
20400
1990-0640
A2P1
NO PART NUM6Cfi:$C€ A?HM
A2f?
IKt-4340
COMNCCTOR 10-PIN F POST TYPE
27294
22>01-2tei
1261-3476
CONTACT-CONN 0/W FOST TYPE FEU CAP (P/0 P2I
28400
1261-3478
A^Ai
tlaU-2ut6
KeSISTA 20J 9t •25» FC TC«-400/*600
OlUl
C620I9
A2A2
0»«J-2Al9
K£SISIM 220 SS •2S« FC TC«-400/»600
OU21
CB22I3
A2h>
044A-2<1>
AESiSlOK 22b 36 .2»i> FC TC— 9(>(>/*»00
01121
C62213
•2AA
04 63-3^25
KbSiSlOA 33 S6 .2Sa FC TC*-«M/*>90
01121
CB3906
A2A»
0»»3-3A0$
AcSi&IOR 33 36 .236 FC TC— 900/*300
01121
C63303
A2HO
0« 4i-3JJ5
AlSJSrA 3i >4 *26K FC 7C»-4007*S0O
OL121
C63609
AAH7
4»S3-3aO>
A23ISI0R 33 5t .236 FC TC*-9aO/«300
01121
conos
A2nB
04«i-A40>
MSISIUA 33 3X .236 FC IC>-9M/*3«0
01121
C63303
A2AV
04 AI-AaOS
ALSiSlA la SS •2»b FC fC<-400/»500
01121
C033O9
A2n iCr
040>-3J09
RcSISIO* 33 32 .236 FC 7C— 903/*»aO
01121
C6M03
A2Ali
3«Ea-3jO>
AtblSIOft 33 36 .236 Fk TC<-9D0/*3O0
01121
C63303
A2AU
l41iH022 9
IRl6UKX-AEk 6-PIM-3IP .I-PIN-SPCC
11206
730-41-6130
A2«U
1410-0229
l•r60MK-*E3 A-PIH-3IP .1-PIM-SFC6
11236
760-8l-Ail0
A2AIA
I9i0-0«29
MiT«(MA-A£S 4-PlM-SlP •1-PlM-SPCC
1U39
730-61-6330
«2Hl>
1410-0229
Mcl606K-6E3 6-PIN-3IP .1-PI6-SPCC
1123*
73^61-6310
A2Ki»
l»li^ 0«2I
NcTaOlUi-AftS 9-PlN-SIP •1-PIN-SPCG
11239
730-61-X330
A2«iT Aa
lAU-0206
2
6Er60kX-At3 t-PIN-ilP .l-PIM-kPCC
02443
7SO-81-R10K
AMU Aa
iBio-moe
NtTOOHK-lUS 0-FIJ6-SIP .I-PIN-SKO
03483
7SO-81-610K
A<il--S21
9040- 94AA
26
PbkHBurtON «6ilCH
20400
6040-9464
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6120- 22 »*
1
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204 00
6120-2239
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1
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20400
06466-41601
1200-0474
•
S«JCXCr-IC 14-CAf OIP-UM
20410
UOO-0474
Aa see note on schematic 10
8-165
Section VIII
Model 34S5A
Replaceable Parts
Reference
Desigrtation
HP Part
Number
Qty
Description
Mfr
Code
Mfr Part Number
43
JAASi-AbiOA
1
R.l. A&SENdLY. PRUCk$aJA
28400
09499-66909
034&S-aS603
REBUILTEXCHANCE ASSEMtLV
2S480
03459-89903
AKl
oiao-o^to
1
CaPACIIOH-fAb 7.}OF«-7J4 19ViK U
36200
1900339X001 9A7
4K^
OPACI tOR'FlId 7.JUF*-7i)t 1>V<K lA
$6200
1500339X001 9A7
4>C4
•ilitO-OUi
UPACIIOR-FIU ).3\>F*-70( 1>VK 7A
$6200
1900139X001 9A7
4JAi. 42
i>797-IU*i
lUalSIlit 7K 1C .t71« 7 IC>d*-lM
26$60
C4-l/a-T0-700t-F
43M3*
PADOINGIST
3
Kc^nick A.«w It .it>a p Tc>j**ioms.ov)
24$60
04-171-10-4641-7
UAM-4181
1
RtSUUM 2. *78 U .1Z»H F IC*0*-I0«I4.8VI
24$40
C4-l/a-TO-7iri-F
i
AsAISIlX 1.9W It .149N F IC«<>*-IO0(4.0VI
26$40
C4-l/a-T0-196l-P
0l>9a-«A7>
i
KcSUlUa I.37A 14 .129M F IC«0*-10«O.SV]
24S60
C4-l/t-TU-l971-F
u7»r*o*«u
R^^IStUR IK 14 .U»l F tC-»*-IOa OilVI
2i$46
C4-I/8-7O-I0OI-P
i)«Va-17gu
i
KESlStGR 719 14 .179k F 7C«04- 100 Q.SVI
24360
C4-l/a-T0-n9R-F
0797-U*l»
1
■tiisrut 911 It .izsk F rt.*w4-ioua.ovi
26560
C4-178-T0-911R-P
4iJi
l.-OlulIAL >H7*190«H 1 7L t> WJAJ 7 ANU
01255
9N741908N
43Ja
144^ U4I
It-alkItAt 1N74L900H TIL t9 MAl) 7 AND
01295
SN74l.90aN
Aiui
lll4(Klly4
U.-0l<iirAL >k7*l90>M Tit t) aJAU 4 RAND
01295
9R74LS09N
I870-U9V
ll-OlulTAl SN7HS04N TtL 19 HEX 1
01295
SN741 904R
4i0»
i«2i^uy>
1
K-DIcaiAl. aN74l.9l75N III. C.9 WUAU
01295
CN74L9I 79N
43u»
t«U-02fr»
4
• 1C, K0RHHI9
20600
lBia-0766
4iu}
lSl»-U7»»
I
• 1C, H0n-NO9
20600
1818-0765
ISia-CUa*
i
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20600
1818-0264
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2
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20600
1870-16*6
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AC S£RIALNl>MBERS1822AOieOSANOABOVE REPLACESOISMtM
_ I 1 I
8-166
Model 3455A
Appendix A
APPENDIX A
A-1. INTRODUCTION.
A-2. The following section of this manual gives some remote programming (HP-IB) examples for
the 3455A. These examples are given in the HP Basic (-hp- Model 9830A/B Controller ), HPL (-hp-
Model 982SA Controller), and Enhanced Basic (-hp- Models 983SA/B and 984SA/B) Controller)
languages.
A-3. For effective program writing, it is advisable to write a good algorithm first. Then write the
345SA program using the HP-IB information in Section III of this manual and the appropriate con-
troller manual. Most -hp- controller manuals have a summary of the HP-IB messages (usually in the
HP-IB section) in a tabular form. These messages are written in the respective controller languages
and are given as sample HP-IB operations. This information and the following program examples
can be very helpful when you start writing programs for the 34SSA.
A-4. Program Example 1 1: In this program example, the 345S A is set up to take SO readings quickly
(with Auto-Cal ofQ and stores them into an Array. Each reading is printed out after all the readings
have been taken. The 34SSA is then set back to the Auto-Cal mode to insure accuracy. The programs
in this example perform basically the same functions using different languages. The first program in
this example is written in the HP Basic language, the second in HPL, and the third in Enhanced
Basic.
Example#! (HP Basic).
10
20
30
40
50
60
70
30
90
100
110
120
130
140
150
DIM
CMD
FOR
CMD
R[ 50 ]
•’?U6"i ’FIR
1=1 TO 50
'•?U6-
3B
FORMRT
OUTPUT < 13.50)256>8»512-
CI1D '■•■'’V5‘^
FORMRT E13.6
ENTER <13j80>Rtn-
HEXT I
CMD '•?U6'S"R1-
FOR 1=1 TO
PRINT fill
NEXT I
END
S«t DVM to OCV (Ft I, Autorange IH7). Hold/Manual (T3).
Auto-Cat Off lAOl and Data Ready Off (DO).
Begin For. ..Next Loop
Address DVM to Listen, Controller to Talk.
Formal the Output.
Trigger the OVM IG6T).
Set OVM to Talk.
Format the Output Ireadingl.
— Enter the Output into Variable.
— Complete For. ..Next loop.
• Auto-Cal on to Maintain Accuracy (All.
Begin For. ..Next Loop.
Print the Entire Array.
Complete For. ..Next Loop
Ends the Program.
A- 1
Appendix A
Model 3455A
Example K 1
(HPL).
0:
d i n
fi[ 50 J
l:
del/
"Doin"
2:
w rt-
''Doi'i"
O •
■
f' 0 r
1 = 1 t
4!
t rg
"Dvi'i-
5!
red
"DMii'i"
6:
next
I
7:
i.i'rt
"Dmi'i"
8:
Txd
r —
9:
for
1^1 t
10:
r.-rt
fl[ I ]
Dimension iKe Array.
Assign Name to the OVM Address.
Set DVM to OCV (FI), Autorange (R7I. Hold/Manuai {T3>.
Auto-Cal Off (AD), Data Ready Off (DO)
'Begin For. ..Next Loop.
—Trigger OVM (GET).
'—Enter the Readirtg into Variable.
*27;
Complete For. ..Next Loop.
Auto-Cal on to Maintain Accuracy.
Formal the Output.
Begin For. ..Next Loop.
Print the Entire Array,
ompleie For.. .Next Loop,
lear the OVM (set to turn on state). ISDC).
Advance Printer 3 Spaces,
nds the Program.
Example (Enhanced Basic)
10
20
30
40
50
60
70
80
90
100
110
120
OPTION BfiSE 1-
DIM Volta-^e'-SO.'
Dui'i=722-
OUTPUT Dwii "F1R7T2T3PI0D0>
FOR Ir.dex=l TO 50
TRIuGER EKv-f'i
Choose Option Base for Array (see Note).
Dimension the Array.
Use Variable for OVM Address.
Set DVM to OCV CEO. Autorange (R7I. Hold/Manuai (T3).
'Auto-Cai Off (AO), and Data Ready Off IDO *
-Begin For. ..Next Loop.
-Trigger DVM (GET).
ENTER Dm/'I? Vo 1 Index . „ ..
T 1 Enter the Reading into Variable.
NEXT Index-
OUTPUT Dyfi? Complete For...Next Loop.
F I XED 6 * —Auto-Cal on to Maintain Accuracy.
MRT PRINT Vo 1 t g-gi=-~ ^ -Format the Array.
END— -Print the Entire Array.
.Ends the Program.
Note: Refer to Controiler Manuai for Explanation of Option Base
A-5. Program Example H2: When the 3455A is in the Binary mode, another feature called the
“Learn Mode" can be used. With this feature, the set-up of the instrument (F1T3, etc) can be learned
by the controller to be used later on in the program. This can be accomplished by sending the 34S5A
an ASCII “B“ in the Data Mode and reading the next four bytes output by the instrument into a str-
ing variable. The instrument can then be reprogrammed to the previous set-up by using the string
variable instead of program codes. It is important to remember to program the 34SSA into the Binary
mode by sending an ASCII “B“. The instrument can transfer Us set-up information to the controller
in the Binary mode only. The following programs show how the “Learn Mode" feature can be used.
These programs are written in the HP Basic, HPL, and Enhanced Basic languages.
A-2
Model 3455A
Appendix A
Example #2 (HP Basic)
10
20
30
40
50
60
?0
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
360
370
380
390
400
410
420
DIN R[ 10]i.BfC20
CMD '•?U6". "EY20SYEZ-691
CND "?U6"» "F1M1T3T3H0R1
CND ‘'?V5"
FDRMRT 4B«F6.0-
ENTER <13»50)B$*
B*[5]=B$C18]
CMD ‘'?U6"» "FSMSRZ-
FOR 1 = 1 TO 10-
CMD "?U6-
FORMRT SB-
OUTPUT (13j 110)256i
CND "?V5'
FORMRT F13.6-
ENTER <13, 140>R[ I ]-
NEXT I
FOR J=1 TO
NR IT 100
DISP J
NEXT
Oimention Variables.
Store 20 into "Y"arxl -69100 Into "Z" Registers of OVM
Set DVM to DCV IF1), Scale (M1>. Hold/ManusI IT3I, High
Resolution Off <H0). Auto-Cal on |A1|, 10 V Range IR31.
and Sinary Program IB).
Address OVM to Listen.
Format the Output.
Enter Output into String Variable.
-Enter First Four Characters of Output into String Variable
Set OVM to ACV (F3>. Math OH (M3), and Autorangs on
(R7).
CMD "YUS"—
FORMRT
OUTPUT <13,220)B$
CMD •'?U6"
FORMRT 3B^
OUTPUT <13,250)256,8,5
CND
FORMAT F13.6
ENTER <13,280)0
FOR 1=1 TO 10
FORMRT F13.5
NRITE <15,310)RC
NEXT I
PRINT
FORMRT F13.0, '•R-
NRITE <15,350)C'
PRINT-
PRINT-
CMD “YUe-
FORMRT SB-
OUTPUT <13, 400)256, 4, oj
END-
12 -
Begin For.. .Next Loop.
Address OVM to Listen, Controller to Talk.
Format the Output.
Trigger the OVM (GET).
Set OVM to Talk.
Format the Output Iresdingl.
Enter the Output of the OVM into Variable.
Complete For. ..Next Loop.
Local Controller Operation without OVM.
— Set OVM to Listen.
— Format to set OVM into Binary Mode.
— Sat up OVM to Binary Information in String.
— Set OVM to Listen, Controller to Talk.
— Fornwt the Output.
— Trigger the OVM (GET).
— Set OVM to Talk.
Format the Output |resdir>g|.
Enter Output into Varieble.
Begin For. ..Next Loop.
Format the Default Printer.
Print the Entire Array.
Complete For. ..Next Loop.
Skip a Space on Default Printer.
Format the Default Printer.
Print Value in Variable.
Skip a Space on Default Printer.
Skip a Space on Default Printer.
Set OVM to Listen, Controller to Talk.
Format the Output.
Clear the OVM (set to turn-on state), (SDC).
Ends the Program.
A-3
Appendix A
Model 3455A
Example #2 (HPU
difi
dekJ
wrt.
f fit
wrt
flit'
red
wrt
f o r
t rg
0:
i:
2 :
3:
4:
5:
6 :
7:
8:
9:
10
1 1
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
*19550
R[ 10]!>B$C
'■Dvfi ">72^::
"Dyfi" j
cl 3# z-
•'EY20SYEZ-69100S2^
"FUZTSHeMlRSBi^
"DurVjBf'
'•Dyf-i‘’» ‘’F3H3R7-
I-l to 10
'•Dgfi •'
red "Du
next I
fxd 0
for J=1
wait 100
dsp J
next J
wrt "Iiwi'i
Olmenaion Virlable.
AatiQn Name to the DVM Addraes.
Store 20 Into "Y" and -691 00 Into "Z" Regiaters of DVM.
Format Output.
Set DVM to DCV IF1), Hotd/Manual ITS). High Reaolution
)ff (HOI, Scale (Ml), 10 V Range (RSI, and Binary Program
( 8 ).
•Reformat to TurtvOn Cor>dition.
•Entire Birtary Charactara into String.
Set-up DVM to ACV IF3I, Math OH IMS), and Autorange
IR7).
Begin For.. .Next Loop.
Trigger the DVM (GET),
nter Output of DVM ^to Variable,
omplete For.. .Next Loop,
ormat Output.
Local Controllar Operation without DVM.
Set-up DVM to Binary Information in String.
Trigger tl>e DVM (GET).
Enter Output into Variable.
Format the Output.
For.. .Next Loop.
Rrint the Entire Array.
Omplete For.. .Next Loop,
onnat the Default Winter,
int Value in Variable.
iear the DVM (aet to turrt-on atate). (SDC).
Advance Default Printer S Spacea.
rvfa tlw Program.
A-4
Model 3455A
Appendix A
Example M2 (Enhanced Basic!
10
20
30
31
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
181
190
191
200
210
220
OPTION BRSE 1
DIM Ri-ipI itudt < 1 0)
D 's' I'l - 7 22^
OUTPUT Dyro; "EY20SYEZ-69100S2 -
IMAGE #»13R^
ChoOM Option Baia for Array (a«e Note).
Dimension the Array.
Use Variable for OVM Address.
Store 20 into"Y" and -69 100 into "2" Registers of DVM.
Format the Output Statement.
OUTPUT DuM using 40; "FlT2T3H0t11R3B-^®«» OVM to OCV (FII. Hold/MenuaUTSl. High Resolution
ENTER Dt'i^ J B i no r VT - Off IHOI. Scale (MD. IOV Range IRSI, and Binary Program
OUTPUT DufflS ‘•F3M3R7:2 . o-
FOR Index=l TO ____J~Ent« Binary character. .ntoStr.ng.
TRIGGER P ' ■ II ^ Set DVM to ACV (F3). Math Off (MU. and Auiorange IR7).
ENTER fli'lpl ilude< Index — -Begin For,. ,Ne«t Loop.
NEXT Index
Locol-operation; FOR J=1 TO 50 Y^e„,^ Output of dvm into variable.
I V. Complete For.. .Next Loop.
NEXT J i ^Local Controller Operation without OVM.
OUTPUT Dui'i 5 " B “ > Bi no. ry$ ' -Set-up DVM to Binary information in String.
TRIGGER Dwr'l Trigger the DVM (GET).
ENTER Dui'i 5 Reo.di n-g-
FIXED 6
MAT PRINT Rnplitude-
FIXED
PRINT USING "K'‘ 5 Reading! "H-
CLEAR DL-'h-
END-
Enter Output into Variable.
Format the Output.
Print the Entire Array.
Format the Default Primer.
Print Value in Variable.
Clear the OVM (set to tum-on state), (SDCI.
Ertds the Program.
Note; Refer to Controller Manual for explanation of Option Base.
A-5/A-6
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